SSISO Community

ScrollView 안에 RecyclerView 스크롤 부드럽게 안드로이드 캔버스(Canvas)를 이용한 선 따라가기 onTouch 이벤트 /뷰 이동 / 뷰 드래그 앤 드랍 / 레이아웃 밖으로 못나가게 하기 안드로이드 애니메이션(Animation) 프레임애니메이션(FrameAnimation) 안드로이드 애니메이션(Animation)효과 주기 트윈애니메이션(TweenAnimation) Rubik Cube Animation Example In Android 안드로이드 개발 문서 1 How to Create a Bubble Selection Animation on Android 3D Graphics with OpenGL Basic Theory Maths - Rays

시소당

Rubik Cube Animation Example In Android

This example shows how you can create Rubik’s cube in android.

Algorithm:

1.) Create a new project by File-> New -> Android Project name it RubikCubeAnimationExample.

2.) Create and write following into src/M4.java:

package com.example.RubikCubeAnimationExample;

public class M4 {
public float[][] m = new float[4][4];

public M4() {
}

public M4(M4 other) {
for (int i = 0; i < 4; i++) {
for (int j = 0; j < 4; j++) {
m[i][j] = other.m[i][j];
}
}
}

public void multiply(GLVertex src, GLVertex dest) {
dest.x = src.x * m[0][0] + src.y * m[1][0] + src.z * m[2][0] + m[3][0];
dest.y = src.x * m[0][1] + src.y * m[1][1] + src.z * m[2][1] + m[3][1];
dest.z = src.x * m[0][2] + src.y * m[1][2] + src.z * m[2][2] + m[3][2];
}

public M4 multiply(M4 other) {
M4 result = new M4();
float[][] m1 = m;
float[][] m2 = other.m;

for (int i = 0; i < 4; i++) {
for (int j = 0; j < 4; j++) {
result.m[i][j] = m1[i][0]*m2[0][j] + m1[i][1]*m2[1][j] + m1[i][2]*m2[2][j] + m1[i][3]*m2[3][j];
}
}

return result;
}

public void setIdentity() {
for (int i = 0; i < 4; i++) {
for (int j = 0; j < 4; j++) {
m[i][j] = (i == j ? 1f : 0f);
}
}
}

@Override
public String toString() {
StringBuilder builder = new StringBuilder("[ ");
for (int i = 0; i < 4; i++) {
for (int j = 0; j < 4; j++) {
builder.append(m[i][j]);
builder.append(" ");
}
if (i < 2)
builder.append("n ");
}
builder.append(" ]");
return builder.toString();
}
}

package com.example.RubikCubeAnimationExample;

public class M4 {

public float[][] m = new float[4][4];

public M4() {

}

public M4(M4 other) {

for (int i = 0; i < 4; i++) {

for (int j = 0; j < 4; j++) {

m[i][j] = other.m[i][j];

}

public void multiply(GLVertex src, GLVertex dest) {

dest.x = src.x * m[0][0] + src.y * m[1][0] + src.z * m[2][0] + m[3][0];

dest.y = src.x * m[0][1] + src.y * m[1][1] + src.z * m[2][1] + m[3][1];

dest.z = src.x * m[0][2] + src.y * m[1][2] + src.z * m[2][2] + m[3][2];

}

public M4 multiply(M4 other) {

M4 result = new M4();

float[][] m1 = m;

float[][] m2 = other.m;

for (int i = 0; i < 4; i++) {

for (int j = 0; j < 4; j++) {

result.m[i][j] = m1[i][0]*m2[0][j] + m1[i][1]*m2[1][j] + m1[i][2]*m2[2][j] + m1[i][3]*m2[3][j];

}

return result;

}

public void setIdentity() {

for (int i = 0; i < 4; i++) {

for (int j = 0; j < 4; j++) {

m[i][j] = (i == j ? 1f : 0f);

}

@Override

public String toString() {

StringBuilder builder = new StringBuilder("[ ");

for (int i = 0; i < 4; i++) {

for (int j = 0; j < 4; j++) {

builder.append(m[i][j]);

builder.append(" ");

}

if (i < 2)

builder.append("n ");

}

builder.append(" ]");

return builder.toString();

}

3.) Create and write following into src/Layer.java:

package com.example.RubikCubeAnimationExample;

public class Layer {

public Layer(int axis) {
mAxis = axis;
mTransform.setIdentity();
}

public void startAnimation() {
for (int i = 0; i < mShapes.length; i++) {
GLShape shape = mShapes[i];
if (shape != null) {
shape.startAnimation();
}
}
}

public void endAnimation() {
for (int i = 0; i < mShapes.length; i++) {
GLShape shape = mShapes[i];
if (shape != null) {
shape.endAnimation();
}
}
}

public void setAngle(float angle) {
// normalize the angle
float twopi = (float)Math.PI *2f;
while (angle >= twopi) angle -= twopi;
while (angle < 0f) angle += twopi;
// mAngle = angle;

float sin = (float)Math.sin(angle);
float cos = (float)Math.cos(angle);

float[][] m = mTransform.m;
switch (mAxis) {
case kAxisX:
m[1][1] = cos;
m[1][2] = sin;
m[2][1] = -sin;
m[2][2] = cos;
m[0][0] = 1f;
m[0][1] = m[0][2] = m[1][0] = m[2][0] = 0f;
break;
case kAxisY:
m[0][0] = cos;
m[0][2] = sin;
m[2][0] = -sin;
m[2][2] = cos;
m[1][1] = 1f;
m[0][1] = m[1][0] = m[1][2] = m[2][1] = 0f;
break;
case kAxisZ:
m[0][0] = cos;
m[0][1] = sin;
m[1][0] = -sin;
m[1][1] = cos;
m[2][2] = 1f;
m[2][0] = m[2][1] = m[0][2] = m[1][2] = 0f;
break;
}

for (int i = 0; i < mShapes.length; i++) {
GLShape shape = mShapes[i];
if (shape != null) {
shape.animateTransform(mTransform);
}
}
}

GLShape[] mShapes = new GLShape[9];
M4 mTransform = new M4();
int mAxis;
static public final int kAxisX = 0;
static public final int kAxisY = 1;
static public final int kAxisZ = 2;
}

package com.example.RubikCubeAnimationExample;

public class Layer {

public Layer(int axis) {

mAxis = axis;

mTransform.setIdentity();

}

public void startAnimation() {

for (int i = 0; i < mShapes.length; i++) {

GLShape shape = mShapes[i];

if (shape != null) {

shape.startAnimation();

}

public void endAnimation() {

for (int i = 0; i < mShapes.length; i++) {

GLShape shape = mShapes[i];

if (shape != null) {

shape.endAnimation();

}

public void setAngle(float angle) {

// normalize the angle

float twopi = (float)Math.PI *2f;

while (angle >= twopi) angle -= twopi;

while (angle < 0f) angle += twopi;

// mAngle = angle;

float sin = (float)Math.sin(angle);

float cos = (float)Math.cos(angle);

float[][] m = mTransform.m;

switch (mAxis) {

case kAxisX:

m[1][1] = cos;

m[1][2] = sin;

m[2][1] = -sin;

m[2][2] = cos;

m[0][0] = 1f;

m[0][1] = m[0][2] = m[1][0] = m[2][0] = 0f;

break;

case kAxisY:

m[0][0] = cos;

m[0][2] = sin;

m[2][0] = -sin;

m[2][2] = cos;

m[1][1] = 1f;

m[0][1] = m[1][0] = m[1][2] = m[2][1] = 0f;

break;

case kAxisZ:

m[0][0] = cos;

m[0][1] = sin;

m[1][0] = -sin;

m[1][1] = cos;

m[2][2] = 1f;

m[2][0] = m[2][1] = m[0][2] = m[1][2] = 0f;

break;

}

for (int i = 0; i < mShapes.length; i++) {

GLShape shape = mShapes[i];

if (shape != null) {

shape.animateTransform(mTransform);

}

GLShape[] mShapes = new GLShape[9];

M4 mTransform = new M4();

int mAxis;

static public final int kAxisX = 0;

static public final int kAxisY = 1;

static public final int kAxisZ = 2;

}

4.) Create and write following into src/KubeRenderer.java:

package com.example.RubikCubeAnimationExample;

import android.opengl.GLSurfaceView;
import javax.microedition.khronos.egl.EGLConfig;
import javax.microedition.khronos.opengles.GL10;

class KubeRenderer implements GLSurfaceView.Renderer {
public interface AnimationCallback {
void animate();
}

public KubeRenderer(GLWorld world, AnimationCallback callback) {
mWorld = world;
mCallback = callback;
}

public void onDrawFrame(GL10 gl) {
if (mCallback != null) {
mCallback.animate();
}
gl.glClearColor(0.5f,0.5f,0.5f,1);
gl.glClear(GL10.GL_COLOR_BUFFER_BIT | GL10.GL_DEPTH_BUFFER_BIT);
gl.glMatrixMode(GL10.GL_MODELVIEW);
gl.glLoadIdentity();
gl.glTranslatef(0, 0, -3.0f);
gl.glScalef(0.5f, 0.5f, 0.5f);
gl.glRotatef(mAngle, 0, 1, 0);
gl.glRotatef(mAngle*0.25f, 1, 0, 0);

gl.glColor4f(0.7f, 0.7f, 0.7f, 1.0f);
gl.glEnableClientState(GL10.GL_VERTEX_ARRAY);
gl.glEnableClientState(GL10.GL_COLOR_ARRAY);
gl.glEnable(GL10.GL_CULL_FACE);
gl.glShadeModel(GL10.GL_SMOOTH);
gl.glEnable(GL10.GL_DEPTH_TEST);

mWorld.draw(gl);
}

public void onSurfaceChanged(GL10 gl, int width, int height) {
gl.glViewport(0, 0, width, height);
float ratio = (float)width / height;
gl.glMatrixMode(GL10.GL_PROJECTION);
gl.glLoadIdentity();
gl.glFrustumf(-ratio, ratio, -1, 1, 2, 12);
gl.glDisable(GL10.GL_DITHER);
gl.glActiveTexture(GL10.GL_TEXTURE0);
}

public void onSurfaceCreated(GL10 gl, EGLConfig config) {
}

public void setAngle(float angle) {
mAngle = angle;
}

public float getAngle() {
return mAngle;
}

private GLWorld mWorld;
private AnimationCallback mCallback;
private float mAngle;
}

package com.example.RubikCubeAnimationExample;

import android.opengl.GLSurfaceView;

import javax.microedition.khronos.egl.EGLConfig;

import javax.microedition.khronos.opengles.GL10;

class KubeRenderer implements GLSurfaceView.Renderer {

public interface AnimationCallback {

void animate();

}

public KubeRenderer(GLWorld world, AnimationCallback callback) {

mWorld = world;

mCallback = callback;

}

public void onDrawFrame(GL10 gl) {

if (mCallback != null) {

mCallback.animate();

}

gl.glClearColor(0.5f,0.5f,0.5f,1);

gl.glClear(GL10.GL_COLOR_BUFFER_BIT | GL10.GL_DEPTH_BUFFER_BIT);

gl.glMatrixMode(GL10.GL_MODELVIEW);

gl.glLoadIdentity();

gl.glTranslatef(0, 0, -3.0f);

gl.glScalef(0.5f, 0.5f, 0.5f);

gl.glRotatef(mAngle, 0, 1, 0);

gl.glRotatef(mAngle*0.25f, 1, 0, 0);

gl.glColor4f(0.7f, 0.7f, 0.7f, 1.0f);

gl.glEnableClientState(GL10.GL_VERTEX_ARRAY);

gl.glEnableClientState(GL10.GL_COLOR_ARRAY);

gl.glEnable(GL10.GL_CULL_FACE);

gl.glShadeModel(GL10.GL_SMOOTH);

gl.glEnable(GL10.GL_DEPTH_TEST);

mWorld.draw(gl);

}

public void onSurfaceChanged(GL10 gl, int width, int height) {

gl.glViewport(0, 0, width, height);

float ratio = (float)width / height;

gl.glMatrixMode(GL10.GL_PROJECTION);

gl.glLoadIdentity();

gl.glFrustumf(-ratio, ratio, -1, 1, 2, 12);

gl.glDisable(GL10.GL_DITHER);

gl.glActiveTexture(GL10.GL_TEXTURE0);

}

public void onSurfaceCreated(GL10 gl, EGLConfig config) {

}

public void setAngle(float angle) {

mAngle = angle;

}

public float getAngle() {

return mAngle;

}

private GLWorld mWorld;

private AnimationCallback mCallback;

private float mAngle;

}

5.) Create and write following into src/GLWorld.java:

package com.example.RubikCubeAnimationExample;

import java.nio.ByteBuffer;
import java.nio.ByteOrder;
import java.nio.IntBuffer;
import java.nio.ShortBuffer;
import java.util.Iterator;
import java.util.ArrayList;

import javax.microedition.khronos.opengles.GL10;

public class GLWorld {

public void addShape(GLShape shape) {
mShapeList.add(shape);
mIndexCount += shape.getIndexCount();
}

public void generate() {
ByteBuffer bb = ByteBuffer.allocateDirect(mVertexList.size()*4*4);
bb.order(ByteOrder.nativeOrder());
mColorBuffer = bb.asIntBuffer();

bb = ByteBuffer.allocateDirect(mVertexList.size()*4*3);
bb.order(ByteOrder.nativeOrder());
mVertexBuffer = bb.asIntBuffer();

bb = ByteBuffer.allocateDirect(mIndexCount*2);
bb.order(ByteOrder.nativeOrder());
mIndexBuffer = bb.asShortBuffer();

Iterator iter2 = mVertexList.iterator();
while (iter2.hasNext()) {
GLVertex vertex = iter2.next();
vertex.put(mVertexBuffer, mColorBuffer);
}

Iterator iter3 = mShapeList.iterator();
while (iter3.hasNext()) {
GLShape shape = iter3.next();
shape.putIndices(mIndexBuffer);
}
}

public GLVertex addVertex(float x, float y, float z) {
GLVertex vertex = new GLVertex(x, y, z, mVertexList.size());
mVertexList.add(vertex);
return vertex;
}

public void transformVertex(GLVertex vertex, M4 transform) {
vertex.update(mVertexBuffer, transform);
}

int count = 0;
public void draw(GL10 gl)
{
mColorBuffer.position(0);
mVertexBuffer.position(0);
mIndexBuffer.position(0);

gl.glFrontFace(GL10.GL_CW);
gl.glShadeModel(GL10.GL_FLAT);
gl.glVertexPointer(3, GL10.GL_FIXED, 0, mVertexBuffer);
gl.glColorPointer(4, GL10.GL_FIXED, 0, mColorBuffer);
gl.glDrawElements(GL10.GL_TRIANGLES, mIndexCount, GL10.GL_UNSIGNED_SHORT, mIndexBuffer);
count++;
}

static public float toFloat(int x) {
return x/65536.0f;
}

private ArrayList mShapeList = new ArrayList();
private ArrayList mVertexList = new ArrayList();

private int mIndexCount = 0;

private IntBuffer mVertexBuffer;
private IntBuffer mColorBuffer;
private ShortBuffer mIndexBuffer;
}

package com.example.RubikCubeAnimationExample;

import java.nio.ByteBuffer;

import java.nio.ByteOrder;

import java.nio.IntBuffer;

import java.nio.ShortBuffer;

import java.util.Iterator;

import java.util.ArrayList;

import javax.microedition.khronos.opengles.GL10;

public class GLWorld {

public void addShape(GLShape shape) {

mShapeList.add(shape);

mIndexCount += shape.getIndexCount();

}

public void generate() {

ByteBuffer bb = ByteBuffer.allocateDirect(mVertexList.size()*4*4);

bb.order(ByteOrder.nativeOrder());

mColorBuffer = bb.asIntBuffer();

bb = ByteBuffer.allocateDirect(mVertexList.size()*4*3);

bb.order(ByteOrder.nativeOrder());

mVertexBuffer = bb.asIntBuffer();

bb = ByteBuffer.allocateDirect(mIndexCount*2);

bb.order(ByteOrder.nativeOrder());

mIndexBuffer = bb.asShortBuffer();

Iterator iter2 = mVertexList.iterator();

while (iter2.hasNext()) {

GLVertex vertex = iter2.next();

vertex.put(mVertexBuffer, mColorBuffer);

}

Iterator iter3 = mShapeList.iterator();

while (iter3.hasNext()) {

GLShape shape = iter3.next();

shape.putIndices(mIndexBuffer);

}

public GLVertex addVertex(float x, float y, float z) {

GLVertex vertex = new GLVertex(x, y, z, mVertexList.size());

mVertexList.add(vertex);

return vertex;

}

public void transformVertex(GLVertex vertex, M4 transform) {

vertex.update(mVertexBuffer, transform);

}

int count = 0;

public void draw(GL10 gl)

{

mColorBuffer.position(0);

mVertexBuffer.position(0);

mIndexBuffer.position(0);

gl.glFrontFace(GL10.GL_CW);

gl.glShadeModel(GL10.GL_FLAT);

gl.glVertexPointer(3, GL10.GL_FIXED, 0, mVertexBuffer);

gl.glColorPointer(4, GL10.GL_FIXED, 0, mColorBuffer);

gl.glDrawElements(GL10.GL_TRIANGLES, mIndexCount, GL10.GL_UNSIGNED_SHORT, mIndexBuffer);

count++;

}

static public float toFloat(int x) {

return x/65536.0f;

}

private ArrayList mShapeList = new ArrayList();

private ArrayList mVertexList = new ArrayList();

private int mIndexCount = 0;

private IntBuffer mVertexBuffer;

private IntBuffer mColorBuffer;

private ShortBuffer mIndexBuffer;

}

6.) Create and write following into src/GLVertex.java:

package com.example.RubikCubeAnimationExample;

import java.nio.IntBuffer;

public class GLVertex {

public float x;
public float y;
public float z;
final short index; // index in vertex table
GLColor color;

GLVertex() {
this.x = 0;
this.y = 0;
this.z = 0;
this.index = -1;
}

GLVertex(float x, float y, float z, int index) {
this.x = x;
this.y = y;
this.z = z;
this.index = (short)index;
}

@Override
public boolean equals(Object other) {
if (other instanceof GLVertex) {
GLVertex v = (GLVertex)other;
return (x == v.x && y == v.y && z == v.z);
}
return false;
}

static public int toFixed(float x) {
return (int)(x * 65536.0f);
}

public void put(IntBuffer vertexBuffer, IntBuffer colorBuffer) {
vertexBuffer.put(toFixed(x));
vertexBuffer.put(toFixed(y));
vertexBuffer.put(toFixed(z));
if (color == null) {
colorBuffer.put(0);
colorBuffer.put(0);
colorBuffer.put(0);
colorBuffer.put(0);
} else {
colorBuffer.put(color.red);
colorBuffer.put(color.green);
colorBuffer.put(color.blue);
colorBuffer.put(color.alpha);
}
}

public void update(IntBuffer vertexBuffer, M4 transform) {
// skip to location of vertex in mVertex buffer
vertexBuffer.position(index * 3);

if (transform == null) {
vertexBuffer.put(toFixed(x));
vertexBuffer.put(toFixed(y));
vertexBuffer.put(toFixed(z));
} else {
GLVertex temp = new GLVertex();
transform.multiply(this, temp);
vertexBuffer.put(toFixed(temp.x));
vertexBuffer.put(toFixed(temp.y));
vertexBuffer.put(toFixed(temp.z));
}
}
}

package com.example.RubikCubeAnimationExample;

import java.nio.IntBuffer;

public class GLVertex {

public float x;

public float y;

public float z;

final short index; // index in vertex table

GLColor color;

GLVertex() {

this.x = 0;

this.y = 0;

this.z = 0;

this.index = -1;

}

GLVertex(float x, float y, float z, int index) {

this.x = x;

this.y = y;

this.z = z;

this.index = (short)index;

}

@Override

public boolean equals(Object other) {

if (other instanceof GLVertex) {

GLVertex v = (GLVertex)other;

return (x == v.x && y == v.y && z == v.z);

}

return false;

}

static public int toFixed(float x) {

return (int)(x * 65536.0f);

}

public void put(IntBuffer vertexBuffer, IntBuffer colorBuffer) {

vertexBuffer.put(toFixed(x));

vertexBuffer.put(toFixed(y));

vertexBuffer.put(toFixed(z));

if (color == null) {

colorBuffer.put(0);

} else {

colorBuffer.put(color.red);

colorBuffer.put(color.green);

colorBuffer.put(color.blue);

colorBuffer.put(color.alpha);

}

public void update(IntBuffer vertexBuffer, M4 transform) {

// skip to location of vertex in mVertex buffer

vertexBuffer.position(index * 3);

if (transform == null) {

vertexBuffer.put(toFixed(x));

vertexBuffer.put(toFixed(y));

vertexBuffer.put(toFixed(z));

} else {

GLVertex temp = new GLVertex();

transform.multiply(this, temp);

vertexBuffer.put(toFixed(temp.x));

vertexBuffer.put(toFixed(temp.y));

vertexBuffer.put(toFixed(temp.z));

}

7.) Create and write following into src/GLShape.java:

package com.example.RubikCubeAnimationExample;

import java.nio.ShortBuffer;
import java.util.ArrayList;
import java.util.Iterator;

public class GLShape {

public GLShape(GLWorld world) {
mWorld = world;
}

public void addFace(GLFace face) {
mFaceList.add(face);
}

public void setFaceColor(int face, GLColor color) {
mFaceList.get(face).setColor(color);
}

public void putIndices(ShortBuffer buffer) {
Iterator iter = mFaceList.iterator();
while (iter.hasNext()) {
GLFace face = iter.next();
face.putIndices(buffer);
}
}

public int getIndexCount() {
int count = 0;
Iterator iter = mFaceList.iterator();
while (iter.hasNext()) {
GLFace face = iter.next();
count += face.getIndexCount();
}
return count;
}

public GLVertex addVertex(float x, float y, float z) {

// look for an existing GLVertex first
Iterator iter = mVertexList.iterator();
while (iter.hasNext()) {
GLVertex vertex = iter.next();
if (vertex.x == x && vertex.y == y && vertex.z == z) {
return vertex;
}
}

// doesn't exist, so create new vertex
GLVertex vertex = mWorld.addVertex(x, y, z);
mVertexList.add(vertex);
return vertex;
}

public void animateTransform(M4 transform) {
mAnimateTransform = transform;

if (mTransform != null)
transform = mTransform.multiply(transform);

Iterator iter = mVertexList.iterator();
while (iter.hasNext()) {
GLVertex vertex = iter.next();
mWorld.transformVertex(vertex, transform);
}
}

public void startAnimation() {
}

public void endAnimation() {
if (mTransform == null) {
mTransform = new M4(mAnimateTransform);
} else {
mTransform = mTransform.multiply(mAnimateTransform);
}
}

public M4 mTransform;
public M4 mAnimateTransform;
protected ArrayList mFaceList = new ArrayList();
protected ArrayList mVertexList = new ArrayList();
protected ArrayList mIndexList = new ArrayList(); // make more efficient?
protected GLWorld mWorld;
}

package com.example.RubikCubeAnimationExample;

import java.nio.ShortBuffer;

import java.util.ArrayList;

import java.util.Iterator;

public class GLShape {

public GLShape(GLWorld world) {

mWorld = world;

}

public void addFace(GLFace face) {

mFaceList.add(face);

}

public void setFaceColor(int face, GLColor color) {

mFaceList.get(face).setColor(color);

}

public void putIndices(ShortBuffer buffer) {

Iterator iter = mFaceList.iterator();

while (iter.hasNext()) {

GLFace face = iter.next();

face.putIndices(buffer);

}

public int getIndexCount() {

int count = 0;

Iterator iter = mFaceList.iterator();

while (iter.hasNext()) {

GLFace face = iter.next();

count += face.getIndexCount();

}

return count;

}

public GLVertex addVertex(float x, float y, float z) {

// look for an existing GLVertex first

Iterator iter = mVertexList.iterator();

while (iter.hasNext()) {

GLVertex vertex = iter.next();

if (vertex.x == x && vertex.y == y && vertex.z == z) {

return vertex;

}

// doesn't exist, so create new vertex

GLVertex vertex = mWorld.addVertex(x, y, z);

mVertexList.add(vertex);

return vertex;

}

public void animateTransform(M4 transform) {

mAnimateTransform = transform;

if (mTransform != null)

transform = mTransform.multiply(transform);

Iterator iter = mVertexList.iterator();

while (iter.hasNext()) {

GLVertex vertex = iter.next();

mWorld.transformVertex(vertex, transform);

}

public void startAnimation() {

}

public void endAnimation() {

if (mTransform == null) {

mTransform = new M4(mAnimateTransform);

} else {

mTransform = mTransform.multiply(mAnimateTransform);

}

public M4 mTransform;

public M4 mAnimateTransform;

protected ArrayList mFaceList = new ArrayList();

protected ArrayList mVertexList = new ArrayList();

protected ArrayList mIndexList = new ArrayList(); // make more efficient?

protected GLWorld mWorld;

}

8.) Create and write following into src/GLFace.java:

package com.example.RubikCubeAnimationExample;

import android.util.Log;

import java.nio.ShortBuffer;
import java.util.ArrayList;

public class GLFace {

public GLFace() {

}

// for triangles
public GLFace(GLVertex v1, GLVertex v2, GLVertex v3) {
addVertex(v1);
addVertex(v2);
addVertex(v3);
}
// for quadrilaterals
public GLFace(GLVertex v1, GLVertex v2, GLVertex v3, GLVertex v4) {
addVertex(v1);
addVertex(v2);
addVertex(v3);
addVertex(v4);
}

public void addVertex(GLVertex v) {
mVertexList.add(v);
}

// must be called after all vertices are added
public void setColor(GLColor c) {

int last = mVertexList.size() - 1;
if (last < 2) {
Log.e("GLFace", "not enough vertices in setColor()");
} else {
GLVertex vertex = mVertexList.get(last);

// only need to do this if the color has never been set
if (mColor == null) {
while (vertex.color != null) {
mVertexList.add(0, vertex);
mVertexList.remove(last + 1);
vertex = mVertexList.get(last);
}
}

vertex.color = c;
}

mColor = c;
}

public int getIndexCount() {
return (mVertexList.size() - 2) * 3;
}

public void putIndices(ShortBuffer buffer) {
int last = mVertexList.size() - 1;

GLVertex v0 = mVertexList.get(0);
GLVertex vn = mVertexList.get(last);

// push triangles into the buffer
for (int i = 1; i < last; i++) {
GLVertex v1 = mVertexList.get(i);
buffer.put(v0.index);
buffer.put(v1.index);
buffer.put(vn.index);
v0 = v1;
}
}

private ArrayList mVertexList = new ArrayList();
private GLColor mColor;
}
[/code]

9.) Create and write following into src/GLColor.java:

[code lang="java"]
package com.example.RubikCubeAnimationExample;

public class GLColor {

public final int red;
public final int green;
public final int blue;
public final int alpha;

public GLColor(int red, int green, int blue, int alpha) {
this.red = red;
this.green = green;
this.blue = blue;
this.alpha = alpha;
}

public GLColor(int red, int green, int blue) {
this.red = red;
this.green = green;
this.blue = blue;
this.alpha = 0x10000;
}

@Override
public boolean equals(Object other) {
if (other instanceof GLColor) {
GLColor color = (GLColor)other;
return (red == color.red &&
green == color.green &&
blue == color.blue &&
alpha == color.alpha);
}
return false;
}
}

100

101

102

103

104

105

106

107

108

109

110

111

112

113

114

115

116

117

118

package com.example.RubikCubeAnimationExample;

import android.util.Log;

import java.nio.ShortBuffer;

import java.util.ArrayList;

public class GLFace {

public GLFace() {

}

// for triangles

public GLFace(GLVertex v1, GLVertex v2, GLVertex v3) {

addVertex(v1);

addVertex(v2);

addVertex(v3);

}

// for quadrilaterals

public GLFace(GLVertex v1, GLVertex v2, GLVertex v3, GLVertex v4) {

addVertex(v1);

addVertex(v2);

addVertex(v3);

addVertex(v4);

}

public void addVertex(GLVertex v) {

mVertexList.add(v);

}

// must be called after all vertices are added

public void setColor(GLColor c) {

int last = mVertexList.size() - 1;

if (last < 2) {

Log.e("GLFace", "not enough vertices in setColor()");

} else {

GLVertex vertex = mVertexList.get(last);

// only need to do this if the color has never been set

if (mColor == null) {

while (vertex.color != null) {

mVertexList.add(0, vertex);

mVertexList.remove(last + 1);

vertex = mVertexList.get(last);

}

vertex.color = c;

}

mColor = c;

}

public int getIndexCount() {

return (mVertexList.size() - 2) * 3;

}

public void putIndices(ShortBuffer buffer) {

int last = mVertexList.size() - 1;

GLVertex v0 = mVertexList.get(0);

GLVertex vn = mVertexList.get(last);

// push triangles into the buffer

for (int i = 1; i < last; i++) {

GLVertex v1 = mVertexList.get(i);

buffer.put(v0.index);

buffer.put(v1.index);

buffer.put(vn.index);

v0 = v1;

}

private ArrayList mVertexList = new ArrayList();

private GLColor mColor;

}

[/code]

9.) Create and write following into src/GLColor.java:

[code lang="java"]

package com.example.RubikCubeAnimationExample;

public class GLColor {

public final int red;

public final int green;

public final int blue;

public final int alpha;

public GLColor(int red, int green, int blue, int alpha) {

this.red = red;

this.green = green;

this.blue = blue;

this.alpha = alpha;

}

public GLColor(int red, int green, int blue) {

this.red = red;

this.green = green;

this.blue = blue;

this.alpha = 0x10000;

}

@Override

public boolean equals(Object other) {

if (other instanceof GLColor) {

GLColor color = (GLColor)other;

return (red == color.red &&

green == color.green &&

blue == color.blue &&

alpha == color.alpha);

}

return false;

}

10.) Create and write following into src/Cube.java:

package com.example.RubikCubeAnimationExample;

public class Cube extends GLShape {

public Cube(GLWorld world, float left, float bottom, float back, float right, float top, float front) {
super(world);
GLVertex leftBottomBack = addVertex(left, bottom, back);
GLVertex rightBottomBack = addVertex(right, bottom, back);
GLVertex leftTopBack = addVertex(left, top, back);
GLVertex rightTopBack = addVertex(right, top, back);
GLVertex leftBottomFront = addVertex(left, bottom, front);
GLVertex rightBottomFront = addVertex(right, bottom, front);
GLVertex leftTopFront = addVertex(left, top, front);
GLVertex rightTopFront = addVertex(right, top, front);
addFace(new GLFace(leftBottomBack, leftBottomFront, rightBottomFront, rightBottomBack));
addFace(new GLFace(leftBottomFront, leftTopFront, rightTopFront, rightBottomFront));
addFace(new GLFace(leftBottomBack, leftTopBack, leftTopFront, leftBottomFront));
addFace(new GLFace(rightBottomBack, rightBottomFront, rightTopFront, rightTopBack));
addFace(new GLFace(leftBottomBack, rightBottomBack, rightTopBack, leftTopBack));
addFace(new GLFace(leftTopBack, rightTopBack, rightTopFront, leftTopFront));

}

public static final int kBottom = 0;
public static final int kFront = 1;
public static final int kLeft = 2;
public static final int kRight = 3;
public static final int kBack = 4;
public static final int kTop = 5;

}

package com.example.RubikCubeAnimationExample;

public class Cube extends GLShape {

public Cube(GLWorld world, float left, float bottom, float back, float right, float top, float front) {

super(world);

GLVertex leftBottomBack = addVertex(left, bottom, back);

GLVertex rightBottomBack = addVertex(right, bottom, back);

GLVertex leftTopBack = addVertex(left, top, back);

GLVertex rightTopBack = addVertex(right, top, back);

GLVertex leftBottomFront = addVertex(left, bottom, front);

GLVertex rightBottomFront = addVertex(right, bottom, front);

GLVertex leftTopFront = addVertex(left, top, front);

GLVertex rightTopFront = addVertex(right, top, front);

addFace(new GLFace(leftBottomBack, leftBottomFront, rightBottomFront, rightBottomBack));

addFace(new GLFace(leftBottomFront, leftTopFront, rightTopFront, rightBottomFront));

addFace(new GLFace(leftBottomBack, leftTopBack, leftTopFront, leftBottomFront));

addFace(new GLFace(rightBottomBack, rightBottomFront, rightTopFront, rightTopBack));

addFace(new GLFace(leftBottomBack, rightBottomBack, rightTopBack, leftTopBack));

addFace(new GLFace(leftTopBack, rightTopBack, rightTopFront, leftTopFront));

}

public static final int kBottom = 0;

public static final int kFront = 1;

public static final int kLeft = 2;

public static final int kRight = 3;

public static final int kBack = 4;

public static final int kTop = 5;

}

11.) Run for output.

Steps:

1.) Create a project named RubikCubeAnimationExample and set the information as stated in the image.

Build Target: Android 4.0
Application Name: RubikCubeAnimationExample
Package Name: com. example. RubikCubeAnimationExample
Activity Name: RubikCubeAnimationExampleActivity
Min SDK Version: 14

2.) Open RubikCubeAnimationExampleActivity.java file and write following code there:

package com.example.RubikCubeAnimationExample;

import java.util.Random;

import android.app.Activity;
import android.opengl.GLSurfaceView;
import android.os.Bundle;
import android.view.Window;

public class RubikCubeAnimationExampleActivity extends Activity implements KubeRenderer.AnimationCallback {

private GLWorld makeGLWorld()
{
GLWorld world = new GLWorld();

int one = 0x10000;
int half = 0x08000;
GLColor red = new GLColor(one, 0, 0);
GLColor green = new GLColor(0, one, 0);
GLColor blue = new GLColor(0, 0, one);
GLColor yellow = new GLColor(one, one, 0);
GLColor orange = new GLColor(one, half, 0);
GLColor white = new GLColor(one, one, one);
GLColor black = new GLColor(0, 0, 0);

float c0 = -1.0f;
float c1 = -0.38f;
float c2 = -0.32f;
float c3 = 0.32f;
float c4 = 0.38f;
float c5 = 1.0f;

// top back, left to right
mCubes[0] = new Cube(world, c0, c4, c0, c1, c5, c1);
mCubes[1] = new Cube(world, c2, c4, c0, c3, c5, c1);
mCubes[2] = new Cube(world, c4, c4, c0, c5, c5, c1);
// top middle, left to right
mCubes[3] = new Cube(world, c0, c4, c2, c1, c5, c3);
mCubes[4] = new Cube(world, c2, c4, c2, c3, c5, c3);
mCubes[5] = new Cube(world, c4, c4, c2, c5, c5, c3);
// top front, left to right
mCubes[6] = new Cube(world, c0, c4, c4, c1, c5, c5);
mCubes[7] = new Cube(world, c2, c4, c4, c3, c5, c5);
mCubes[8] = new Cube(world, c4, c4, c4, c5, c5, c5);
// middle back, left to right
mCubes[9] = new Cube(world, c0, c2, c0, c1, c3, c1);
mCubes[10] = new Cube(world, c2, c2, c0, c3, c3, c1);
mCubes[11] = new Cube(world, c4, c2, c0, c5, c3, c1);
// middle middle, left to right
mCubes[12] = new Cube(world, c0, c2, c2, c1, c3, c3);
mCubes[13] = null;
mCubes[14] = new Cube(world, c4, c2, c2, c5, c3, c3);
// middle front, left to right
mCubes[15] = new Cube(world, c0, c2, c4, c1, c3, c5);
mCubes[16] = new Cube(world, c2, c2, c4, c3, c3, c5);
mCubes[17] = new Cube(world, c4, c2, c4, c5, c3, c5);
// bottom back, left to right
mCubes[18] = new Cube(world, c0, c0, c0, c1, c1, c1);
mCubes[19] = new Cube(world, c2, c0, c0, c3, c1, c1);
mCubes[20] = new Cube(world, c4, c0, c0, c5, c1, c1);
// bottom middle, left to right
mCubes[21] = new Cube(world, c0, c0, c2, c1, c1, c3);
mCubes[22] = new Cube(world, c2, c0, c2, c3, c1, c3);
mCubes[23] = new Cube(world, c4, c0, c2, c5, c1, c3);
// bottom front, left to right
mCubes[24] = new Cube(world, c0, c0, c4, c1, c1, c5);
mCubes[25] = new Cube(world, c2, c0, c4, c3, c1, c5);
mCubes[26] = new Cube(world, c4, c0, c4, c5, c1, c5);

// paint the sides
int i, j;
// set all faces black by default
for (i = 0; i < 27; i++) {
Cube cube = mCubes[i];
if (cube != null) {
for (j = 0; j < 6; j++)
cube.setFaceColor(j, black);
}
}

// paint top
for (i = 0; i < 9; i++)
mCubes[i].setFaceColor(Cube.kTop, orange);
// paint bottom
for (i = 18; i < 27; i++)
mCubes[i].setFaceColor(Cube.kBottom, red);
// paint left
for (i = 0; i < 27; i += 3)
mCubes[i].setFaceColor(Cube.kLeft, yellow);
// paint right
for (i = 2; i < 27; i += 3)
mCubes[i].setFaceColor(Cube.kRight, white);
// paint back
for (i = 0; i < 27; i += 9)
for (j = 0; j < 3; j++)
mCubes[i + j].setFaceColor(Cube.kBack, blue);
// paint front
for (i = 6; i < 27; i += 9)
for (j = 0; j < 3; j++)
mCubes[i + j].setFaceColor(Cube.kFront, green);

for (i = 0; i < 27; i++)
if (mCubes[i] != null)
world.addShape(mCubes[i]);

// initialize our permutation to solved position
mPermutation = new int[27];
for (i = 0; i < mPermutation.length; i++)
mPermutation[i] = i;

createLayers();
updateLayers();

world.generate();

return world;
}

private void createLayers() {
mLayers[kUp] = new Layer(Layer.kAxisY);
mLayers[kDown] = new Layer(Layer.kAxisY);
mLayers[kLeft] = new Layer(Layer.kAxisX);
mLayers[kRight] = new Layer(Layer.kAxisX);
mLayers[kFront] = new Layer(Layer.kAxisZ);
mLayers[kBack] = new Layer(Layer.kAxisZ);
mLayers[kMiddle] = new Layer(Layer.kAxisX);
mLayers[kEquator] = new Layer(Layer.kAxisY);
mLayers[kSide] = new Layer(Layer.kAxisZ);
}

private void updateLayers() {
Layer layer;
GLShape[] shapes;
int i, j, k;

// up layer
layer = mLayers[kUp];
shapes = layer.mShapes;
for (i = 0; i < 9; i++)
shapes[i] = mCubes[mPermutation[i]];

// down layer
layer = mLayers[kDown];
shapes = layer.mShapes;
for (i = 18, k = 0; i < 27; i++)
shapes[k++] = mCubes[mPermutation[i]];

// left layer
layer = mLayers[kLeft];
shapes = layer.mShapes;
for (i = 0, k = 0; i < 27; i += 9)
for (j = 0; j < 9; j += 3)
shapes[k++] = mCubes[mPermutation[i + j]];

// right layer
layer = mLayers[kRight];
shapes = layer.mShapes;
for (i = 2, k = 0; i < 27; i += 9)
for (j = 0; j < 9; j += 3)
shapes[k++] = mCubes[mPermutation[i + j]];

// front layer
layer = mLayers[kFront];
shapes = layer.mShapes;
for (i = 6, k = 0; i < 27; i += 9)
for (j = 0; j < 3; j++)
shapes[k++] = mCubes[mPermutation[i + j]];

// back layer
layer = mLayers[kBack];
shapes = layer.mShapes;
for (i = 0, k = 0; i < 27; i += 9)
for (j = 0; j < 3; j++)
shapes[k++] = mCubes[mPermutation[i + j]];

// middle layer
layer = mLayers[kMiddle];
shapes = layer.mShapes;
for (i = 1, k = 0; i < 27; i += 9)
for (j = 0; j < 9; j += 3)
shapes[k++] = mCubes[mPermutation[i + j]];

// equator layer
layer = mLayers[kEquator];
shapes = layer.mShapes;
for (i = 9, k = 0; i < 18; i++)
shapes[k++] = mCubes[mPermutation[i]];

// side layer
layer = mLayers[kSide];
shapes = layer.mShapes;
for (i = 3, k = 0; i < 27; i += 9)
for (j = 0; j < 3; j++)
shapes[k++] = mCubes[mPermutation[i + j]];
}

@Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);

// We don't need a title either.
requestWindowFeature(Window.FEATURE_NO_TITLE);

mView = new GLSurfaceView(getApplication());
mRenderer = new KubeRenderer(makeGLWorld(), this);
mView.setRenderer(mRenderer);
setContentView(mView);
}

@Override
protected void onResume()
{
super.onResume();
mView.onResume();
}

@Override
protected void onPause()
{
super.onPause();
mView.onPause();
}

public void animate() {
// change our angle of view
mRenderer.setAngle(mRenderer.getAngle() + 1.2f);

if (mCurrentLayer == null) {
int layerID = mRandom.nextInt(9);
mCurrentLayer = mLayers[layerID];
mCurrentLayerPermutation = mLayerPermutations[layerID];
mCurrentLayer.startAnimation();
boolean direction = mRandom.nextBoolean();
int count = mRandom.nextInt(3) + 1;

count = 1;
direction = false;
mCurrentAngle = 0;
if (direction) {
mAngleIncrement = (float)Math.PI / 50;
mEndAngle = mCurrentAngle + ((float)Math.PI * count) / 2f;
} else {
mAngleIncrement = -(float)Math.PI / 50;
mEndAngle = mCurrentAngle - ((float)Math.PI * count) / 2f;
}
}

mCurrentAngle += mAngleIncrement;

if ((mAngleIncrement > 0f && mCurrentAngle >= mEndAngle) ||
(mAngleIncrement < 0f && mCurrentAngle <= mEndAngle)) {
mCurrentLayer.setAngle(mEndAngle);
mCurrentLayer.endAnimation();
mCurrentLayer = null;

// adjust mPermutation based on the completed layer rotation
int[] newPermutation = new int[27];
for (int i = 0; i < 27; i++) {
newPermutation[i] = mPermutation[mCurrentLayerPermutation[i]];
}
mPermutation = newPermutation;
updateLayers();

} else {
mCurrentLayer.setAngle(mCurrentAngle);
}
}

GLSurfaceView mView;
KubeRenderer mRenderer;
Cube[] mCubes = new Cube[27];
// a Layer for each possible move
Layer[] mLayers = new Layer[9];
// permutations corresponding to a pi/2 rotation of each layer about its axis
static int[][] mLayerPermutations = {
// permutation for UP layer
{ 2, 5, 8, 1, 4, 7, 0, 3, 6, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26 },
// permutation for DOWN layer
{ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 20, 23, 26, 19, 22, 25, 18, 21, 24 },
// permutation for LEFT layer
{ 6, 1, 2, 15, 4, 5, 24, 7, 8, 3, 10, 11, 12, 13, 14, 21, 16, 17, 0, 19, 20, 9, 22, 23, 18, 25, 26 },
// permutation for RIGHT layer
{ 0, 1, 8, 3, 4, 17, 6, 7, 26, 9, 10, 5, 12, 13, 14, 15, 16, 23, 18, 19, 2, 21, 22, 11, 24, 25, 20 },
// permutation for FRONT layer
{ 0, 1, 2, 3, 4, 5, 24, 15, 6, 9, 10, 11, 12, 13, 14, 25, 16, 7, 18, 19, 20, 21, 22, 23, 26, 17, 8 },
// permutation for BACK layer
{ 18, 9, 0, 3, 4, 5, 6, 7, 8, 19, 10, 1, 12, 13, 14, 15, 16, 17, 20, 11, 2, 21, 22, 23, 24, 25, 26 },
// permutation for MIDDLE layer
{ 0, 7, 2, 3, 16, 5, 6, 25, 8, 9, 4, 11, 12, 13, 14, 15, 22, 17, 18, 1, 20, 21, 10, 23, 24, 19, 26 },
// permutation for EQUATOR layer
{ 0, 1, 2, 3, 4, 5, 6, 7, 8, 11, 14, 17, 10, 13, 16, 9, 12, 15, 18, 19, 20, 21, 22, 23, 24, 25, 26 },
// permutation for SIDE layer
{ 0, 1, 2, 21, 12, 3, 6, 7, 8, 9, 10, 11, 22, 13, 4, 15, 16, 17, 18, 19, 20, 23, 14, 5, 24, 25, 26 }
};

// current permutation of starting position
int[] mPermutation;

// for random cube movements
Random mRandom = new Random(System.currentTimeMillis());
// currently turning layer
Layer mCurrentLayer = null;
// current and final angle for current Layer animation
float mCurrentAngle, mEndAngle;
// amount to increment angle
float mAngleIncrement;
int[] mCurrentLayerPermutation;

// names for our 9 layers (based on notation from http://www.cubefreak.net/notation.html)
static final int kUp = 0;
static final int kDown = 1;
static final int kLeft = 2;
static final int kRight = 3;
static final int kFront = 4;
static final int kBack = 5;
static final int kMiddle = 6;
static final int kEquator = 7;
static final int kSide = 8;

}

100

101

102

103

104

105

106

107

108

109

110

111

112

113

114

115

116

117

118

119

120

121

122

123

124

125

126

127

128

129

130

131

132

133

134

135

136

137

138

139

140

141

142

143

144

145

146

147

148

149

150

151

152

153

154

155

156

157

158

159

160

161

162

163

164

165

166

167

168

169

170

171

172

173

174

175

176

177

178

179

180

181

182

183

184

185

186

187

188

189

190

191

192

193

194

195

196

197

198

199

200

201

202

203

204

205

206

207

208

209

210

211

212

213

214

215

216

217

218

219

220

221

222

223

224

225

226

227

228

229

230

231

232

233

234

235

236

237

238

239

240

241

242

243

244

245

246

247

248

249

250

251

252

253

254

255

256

257

258

259

260

261

262

263

264

265

266

267

268

269

270

271

272

273

274

275

276

277

278

279

280

281

282

283

284

285

286

287

288

289

290

291

292

293

294

295

296

297

298

299

300

301

302

303

304

305

306

307

308

309

310

311

312

313

314

315

316

317

318

319

320

321

package com.example.RubikCubeAnimationExample;

import java.util.Random;

import android.app.Activity;

import android.opengl.GLSurfaceView;

import android.os.Bundle;

import android.view.Window;

public class RubikCubeAnimationExampleActivity extends Activity implements KubeRenderer.AnimationCallback {

private GLWorld makeGLWorld()

{

GLWorld world = new GLWorld();

int one = 0x10000;

int half = 0x08000;

GLColor red = new GLColor(one, 0, 0);

GLColor green = new GLColor(0, one, 0);

GLColor blue = new GLColor(0, 0, one);

GLColor yellow = new GLColor(one, one, 0);

GLColor orange = new GLColor(one, half, 0);

GLColor white = new GLColor(one, one, one);

GLColor black = new GLColor(0, 0, 0);

float c0 = -1.0f;

float c1 = -0.38f;

float c2 = -0.32f;

float c3 = 0.32f;

float c4 = 0.38f;

float c5 = 1.0f;

// top back, left to right

mCubes[0] = new Cube(world, c0, c4, c0, c1, c5, c1);

mCubes[1] = new Cube(world, c2, c4, c0, c3, c5, c1);

mCubes[2] = new Cube(world, c4, c4, c0, c5, c5, c1);

// top middle, left to right

mCubes[3] = new Cube(world, c0, c4, c2, c1, c5, c3);

mCubes[4] = new Cube(world, c2, c4, c2, c3, c5, c3);

mCubes[5] = new Cube(world, c4, c4, c2, c5, c5, c3);

// top front, left to right

mCubes[6] = new Cube(world, c0, c4, c4, c1, c5, c5);

mCubes[7] = new Cube(world, c2, c4, c4, c3, c5, c5);

mCubes[8] = new Cube(world, c4, c4, c4, c5, c5, c5);

// middle back, left to right

mCubes[9] = new Cube(world, c0, c2, c0, c1, c3, c1);

mCubes[10] = new Cube(world, c2, c2, c0, c3, c3, c1);

mCubes[11] = new Cube(world, c4, c2, c0, c5, c3, c1);

// middle middle, left to right

mCubes[12] = new Cube(world, c0, c2, c2, c1, c3, c3);

mCubes[13] = null;

mCubes[14] = new Cube(world, c4, c2, c2, c5, c3, c3);

// middle front, left to right

mCubes[15] = new Cube(world, c0, c2, c4, c1, c3, c5);

mCubes[16] = new Cube(world, c2, c2, c4, c3, c3, c5);

mCubes[17] = new Cube(world, c4, c2, c4, c5, c3, c5);

// bottom back, left to right

mCubes[18] = new Cube(world, c0, c0, c0, c1, c1, c1);

mCubes[19] = new Cube(world, c2, c0, c0, c3, c1, c1);

mCubes[20] = new Cube(world, c4, c0, c0, c5, c1, c1);

// bottom middle, left to right

mCubes[21] = new Cube(world, c0, c0, c2, c1, c1, c3);

mCubes[22] = new Cube(world, c2, c0, c2, c3, c1, c3);

mCubes[23] = new Cube(world, c4, c0, c2, c5, c1, c3);

// bottom front, left to right

mCubes[24] = new Cube(world, c0, c0, c4, c1, c1, c5);

mCubes[25] = new Cube(world, c2, c0, c4, c3, c1, c5);

mCubes[26] = new Cube(world, c4, c0, c4, c5, c1, c5);

// paint the sides

int i, j;

// set all faces black by default

for (i = 0; i < 27; i++) {

Cube cube = mCubes[i];

if (cube != null) {

for (j = 0; j < 6; j++)

cube.setFaceColor(j, black);

}

// paint top

for (i = 0; i < 9; i++)

mCubes[i].setFaceColor(Cube.kTop, orange);

// paint bottom

for (i = 18; i < 27; i++)

mCubes[i].setFaceColor(Cube.kBottom, red);

// paint left

for (i = 0; i < 27; i += 3)

mCubes[i].setFaceColor(Cube.kLeft, yellow);

// paint right

for (i = 2; i < 27; i += 3)

mCubes[i].setFaceColor(Cube.kRight, white);

// paint back

for (i = 0; i < 27; i += 9)

for (j = 0; j < 3; j++)

mCubes[i + j].setFaceColor(Cube.kBack, blue);

// paint front

for (i = 6; i < 27; i += 9)

for (j = 0; j < 3; j++)

mCubes[i + j].setFaceColor(Cube.kFront, green);

for (i = 0; i < 27; i++)

if (mCubes[i] != null)

world.addShape(mCubes[i]);

// initialize our permutation to solved position

mPermutation = new int[27];

for (i = 0; i < mPermutation.length; i++)

mPermutation[i] = i;

createLayers();

updateLayers();

world.generate();

return world;

}

private void createLayers() {

mLayers[kUp] = new Layer(Layer.kAxisY);

mLayers[kDown] = new Layer(Layer.kAxisY);

mLayers[kLeft] = new Layer(Layer.kAxisX);

mLayers[kRight] = new Layer(Layer.kAxisX);

mLayers[kFront] = new Layer(Layer.kAxisZ);

mLayers[kBack] = new Layer(Layer.kAxisZ);

mLayers[kMiddle] = new Layer(Layer.kAxisX);

mLayers[kEquator] = new Layer(Layer.kAxisY);

mLayers[kSide] = new Layer(Layer.kAxisZ);

}

private void updateLayers() {

Layer layer;

GLShape[] shapes;

int i, j, k;

// up layer

layer = mLayers[kUp];

shapes = layer.mShapes;

for (i = 0; i < 9; i++)

shapes[i] = mCubes[mPermutation[i]];

// down layer

layer = mLayers[kDown];

shapes = layer.mShapes;

for (i = 18, k = 0; i < 27; i++)

shapes[k++] = mCubes[mPermutation[i]];

// left layer

layer = mLayers[kLeft];

shapes = layer.mShapes;

for (i = 0, k = 0; i < 27; i += 9)

for (j = 0; j < 9; j += 3)

shapes[k++] = mCubes[mPermutation[i + j]];

// right layer

layer = mLayers[kRight];

shapes = layer.mShapes;

for (i = 2, k = 0; i < 27; i += 9)

for (j = 0; j < 9; j += 3)

shapes[k++] = mCubes[mPermutation[i + j]];

// front layer

layer = mLayers[kFront];

shapes = layer.mShapes;

for (i = 6, k = 0; i < 27; i += 9)

for (j = 0; j < 3; j++)

shapes[k++] = mCubes[mPermutation[i + j]];

// back layer

layer = mLayers[kBack];

shapes = layer.mShapes;

for (i = 0, k = 0; i < 27; i += 9)

for (j = 0; j < 3; j++)

shapes[k++] = mCubes[mPermutation[i + j]];

// middle layer

layer = mLayers[kMiddle];

shapes = layer.mShapes;

for (i = 1, k = 0; i < 27; i += 9)

for (j = 0; j < 9; j += 3)

shapes[k++] = mCubes[mPermutation[i + j]];

// equator layer

layer = mLayers[kEquator];

shapes = layer.mShapes;

for (i = 9, k = 0; i < 18; i++)

shapes[k++] = mCubes[mPermutation[i]];

// side layer

layer = mLayers[kSide];

shapes = layer.mShapes;

for (i = 3, k = 0; i < 27; i += 9)

for (j = 0; j < 3; j++)

shapes[k++] = mCubes[mPermutation[i + j]];

}

@Override

protected void onCreate(Bundle savedInstanceState)

{

super.onCreate(savedInstanceState);

// We don't need a title either.

requestWindowFeature(Window.FEATURE_NO_TITLE);

mView = new GLSurfaceView(getApplication());

mRenderer = new KubeRenderer(makeGLWorld(), this);

mView.setRenderer(mRenderer);

setContentView(mView);

}

@Override

protected void onResume()

{

super.onResume();

mView.onResume();

}

@Override

protected void onPause()

{

super.onPause();

mView.onPause();

}

public void animate() {

// change our angle of view

mRenderer.setAngle(mRenderer.getAngle() + 1.2f);

if (mCurrentLayer == null) {

int layerID = mRandom.nextInt(9);

mCurrentLayer = mLayers[layerID];

mCurrentLayerPermutation = mLayerPermutations[layerID];

mCurrentLayer.startAnimation();

boolean direction = mRandom.nextBoolean();

int count = mRandom.nextInt(3) + 1;

count = 1;

direction = false;

mCurrentAngle = 0;

if (direction) {

mAngleIncrement = (float)Math.PI / 50;

mEndAngle = mCurrentAngle + ((float)Math.PI * count) / 2f;

} else {

mAngleIncrement = -(float)Math.PI / 50;

mEndAngle = mCurrentAngle - ((float)Math.PI * count) / 2f;

}

mCurrentAngle += mAngleIncrement;

if ((mAngleIncrement > 0f && mCurrentAngle >= mEndAngle) ||

(mAngleIncrement < 0f && mCurrentAngle <= mEndAngle)) {

mCurrentLayer.setAngle(mEndAngle);

mCurrentLayer.endAnimation();

mCurrentLayer = null;

// adjust mPermutation based on the completed layer rotation

int[] newPermutation = new int[27];

for (int i = 0; i < 27; i++) {

newPermutation[i] = mPermutation[mCurrentLayerPermutation[i]];

}

mPermutation = newPermutation;

updateLayers();

} else {

mCurrentLayer.setAngle(mCurrentAngle);

}

GLSurfaceView mView;

KubeRenderer mRenderer;

Cube[] mCubes = new Cube[27];

// a Layer for each possible move

Layer[] mLayers = new Layer[9];

// permutations corresponding to a pi/2 rotation of each layer about its axis

static int[][] mLayerPermutations = {

// permutation for UP layer

{ 2, 5, 8, 1, 4, 7, 0, 3, 6, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26 },

// permutation for DOWN layer

{ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 20, 23, 26, 19, 22, 25, 18, 21, 24 },

// permutation for LEFT layer

{ 6, 1, 2, 15, 4, 5, 24, 7, 8, 3, 10, 11, 12, 13, 14, 21, 16, 17, 0, 19, 20, 9, 22, 23, 18, 25, 26 },

// permutation for RIGHT layer

{ 0, 1, 8, 3, 4, 17, 6, 7, 26, 9, 10, 5, 12, 13, 14, 15, 16, 23, 18, 19, 2, 21, 22, 11, 24, 25, 20 },

// permutation for FRONT layer

{ 0, 1, 2, 3, 4, 5, 24, 15, 6, 9, 10, 11, 12, 13, 14, 25, 16, 7, 18, 19, 20, 21, 22, 23, 26, 17, 8 },

// permutation for BACK layer

{ 18, 9, 0, 3, 4, 5, 6, 7, 8, 19, 10, 1, 12, 13, 14, 15, 16, 17, 20, 11, 2, 21, 22, 23, 24, 25, 26 },

// permutation for MIDDLE layer

{ 0, 7, 2, 3, 16, 5, 6, 25, 8, 9, 4, 11, 12, 13, 14, 15, 22, 17, 18, 1, 20, 21, 10, 23, 24, 19, 26 },

// permutation for EQUATOR layer

{ 0, 1, 2, 3, 4, 5, 6, 7, 8, 11, 14, 17, 10, 13, 16, 9, 12, 15, 18, 19, 20, 21, 22, 23, 24, 25, 26 },

// permutation for SIDE layer

{ 0, 1, 2, 21, 12, 3, 6, 7, 8, 9, 10, 11, 22, 13, 4, 15, 16, 17, 18, 19, 20, 23, 14, 5, 24, 25, 26 }

};

// current permutation of starting position

int[] mPermutation;

// for random cube movements

Random mRandom = new Random(System.currentTimeMillis());

// currently turning layer

Layer mCurrentLayer = null;

// current and final angle for current Layer animation

float mCurrentAngle, mEndAngle;

// amount to increment angle

float mAngleIncrement;

int[] mCurrentLayerPermutation;

// names for our 9 layers (based on notation from http://www.cubefreak.net/notation.html)

static final int kUp = 0;

static final int kDown = 1;

static final int kLeft = 2;

static final int kRight = 3;

static final int kFront = 4;

static final int kBack = 5;

static final int kMiddle = 6;

static final int kEquator = 7;

static final int kSide = 8;

}

3.) Compile and build the project.

Output

562 view

4.0 stars

SSISO Community