Android Open Source - TreeFrogEngine Render Model

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License

The source code is released under:

MIT License

Java Source Code

package com.discretesoftworks.framework;
/* w w  w  . jav  a2s.  com*/
import java.nio.ByteBuffer;
import java.nio.ByteOrder;
import java.nio.FloatBuffer;
import java.nio.ShortBuffer;

import android.opengl.GLES20;
import android.opengl.Matrix;



public class RenderModel extends GriddedObject{

  //Added for Textures
  private FloatBuffer mTextureCoordinates;
  private int mTextureUniformHandle;
  private int mTextureCoordinateHandle;
  private final int mTextureCoordinateDataSize = 2;
  private int mTextureDataHandle;
  
  
    private final String vertexShaderCode =
      "attribute vec3 a_normal;" +
      "attribute vec2 a_TexCoordinate;" +
      "varying vec2 v_TexCoordinate;" +
      "varying vec4 lightness;" +
      
      //Lights
      "uniform vec4 lightPos;"+
      "uniform vec4 lightColor;"+

        "uniform mat4 uMMatrix;" +
        "uniform mat4 uVPMatrix;" +

        "attribute vec4 vPosition;" +
        "void main() {" +
        "  vec3 ambient = vec3(.6,.6,.6);"+
        "  vec4 worldPos = uMMatrix * vPosition;"+
        "  gl_Position = uVPMatrix * worldPos;" +
    "  v_TexCoordinate = a_TexCoordinate;" +
    "  vec4 normal = vec4(a_normal,0.0);"+
        "  float distance = length(lightPos-worldPos);"+
        "  float dottedAngle = max(dot(normalize(lightPos-worldPos),normal),0.0);" +
    "  lightness = (lightColor * dottedAngle) * (1.0 / (1.0 + distance * distance));"+
        "  lightness = vec4(lightness.xyz + ambient,1.0);"+
        "}";

    private final String fragmentShaderCode =
        "precision mediump float;" +
        "uniform vec4 vColor;" +
      "uniform sampler2D u_Texture;" +
      "varying vec2 v_TexCoordinate;" +
      "varying vec4 lightness;" +
      
        "void main() {" +
        "  gl_FragColor = (lightness * vColor * texture2D(u_Texture, v_TexCoordinate));" +
        "}";

    private FloatBuffer vertexBuffer;
    private FloatBuffer normalBuffer;
    private ShortBuffer drawListBuffer;
    private int mProgram;
    private int mPositionHandle;
    private int mNormalHandle;
    private int mColorHandle;
    private int mMMatrixHandle;
    private int mVPMatrixHandle;
    private int lightPosHandle;
    private int lightColorHandle;

    // number of coordinates per vertex in this array
    static final int COORDS_PER_VERTEX = 3;
    //private PointF topLeft = new PointF(0,0);
    private float[] mModelMatrix = new float[16];
    private float[] identityMatrix = new float[16];
//    private float[] mvpMatrix = new float[16];
    private float[] coords; /*= { -0.5f,  0.5f, 0f,
                         -0.5f, -0.5f, 0f,
                          0.5f, -0.5f, 0f,
                          0.5f,  0.5f, 0f }; /*,
                          0.5f,  0.5f, 1f,
                          0.5f, -0.5f, 1f,
                         -0.5f,  0.5f, 1f, 
                         -0.5f, -0.5f, 1f} ; */

    private short[] drawOrder;/* = { 0, 1, 2, 0, 2, 3 }; /*, 2, 3, 4, 4, 5, 2, 5, 4, 6, 5, 7, 6,
                      7, 1, 2, 2, 5, 7, 0, 1, 7, 7, 6, 0}; // order to draw vertices */

    private final int vertexStride = COORDS_PER_VERTEX * 4; // 4 bytes per vertex
    
    private float[] texCoords;
    private float[] normals;

    // Set color with red, green, blue and alpha (opacity) values
    float color[] = { .75f, .75f, .75f, 1.0f };
    
    //float translation[] = {0, 0, 0};
    float scale[] = {1, 1, 1};
    float autoScale[] = {1, 1, 1};
    
    private Sprite myTextureSprite;
    private float imageSingle;
    private float imageSpeed;
    
    private boolean hudElement;
    private boolean visible;
    private boolean set;
    
    private float[] dir;
    private float[] newDir;
    private boolean spin;
    
    public RenderModel() {
      super(0,0,0,1,1);
      
      hudElement = false;
      visible = false;
        
        myTextureSprite = null;
        imageSingle = 0f;
        imageSpeed = 1f;
        mTextureDataHandle = 0;
        
        set = false;
        spin = true;
        newDir = new float[3];
        dir = new float[3];
        newDir[0] = 0f;
        newDir[1] = 0f;
        newDir[2] = 0f;
        dir[0] = 0f;
        dir[1] = 0f;
        dir[2] = 0f;
        
        Matrix.setIdentityM(identityMatrix, 0);
    }
    
    public void setupModel(float[] verts, float[] normalCoords, float[] textureCoords, short[] indicies) {
      coords = verts;
      texCoords = textureCoords;
      drawOrder = indicies;
      normals = normalCoords;
      
      // initialize vertex byte buffer for shape coordinates
        ByteBuffer bb = ByteBuffer.allocateDirect(
        // (# of coordinate values * 4 bytes per float)
                coords.length * 4);
        bb.order(ByteOrder.nativeOrder());
        vertexBuffer = bb.asFloatBuffer();
        vertexBuffer.put(coords);
        vertexBuffer.position(0);
        
        
        ByteBuffer bn = ByteBuffer.allocateDirect(
                  //#) of normal values * 4 bytes per float
                  normals.length * 4);
        bn.order(ByteOrder.nativeOrder());
        normalBuffer = bn.asFloatBuffer();
        normalBuffer.put(normals);
        normalBuffer.position(0);
        
        // S, T (or X, Y)
        // Texture coordinate data.
        // Because images have a Y axis pointing downward (values increase as you move down the image) while
        // OpenGL has a Y axis pointing upward, we adjust for that here by flipping the Y axis.
        // What's more is that the texture coordinates are the same for every face.
        
        mTextureCoordinates = ByteBuffer.allocateDirect(texCoords.length * 4).order(ByteOrder.nativeOrder()).asFloatBuffer();
        mTextureCoordinates.put(texCoords).position(0);
        
        // initialize byte buffer for the draw list
        ByteBuffer dlb = ByteBuffer.allocateDirect(
        // (# of coordinate values * 2 bytes per short)
                drawOrder.length * 2);
        dlb.order(ByteOrder.nativeOrder());
        drawListBuffer = dlb.asShortBuffer();
        drawListBuffer.put(drawOrder);
        drawListBuffer.position(0);
        
        // prepare shaders and OpenGL program
        int vertexShader = MyGLRenderer.loadShader(GLES20.GL_VERTEX_SHADER,
                                                   vertexShaderCode);
        int fragmentShader = MyGLRenderer.loadShader(GLES20.GL_FRAGMENT_SHADER,
                                                     fragmentShaderCode);
        
        mProgram = GLES20.glCreateProgram();             // create empty OpenGL Program
        GLES20.glAttachShader(mProgram, vertexShader);   // add the vertex shader to program
        GLES20.glAttachShader(mProgram, fragmentShader); // add the fragment shader to program
        
        //Texture Code
        GLES20.glBindAttribLocation(mProgram, 0, "a_TexCoordinate");
        
        GLES20.glLinkProgram(mProgram);                  // create OpenGL program executables
    }
    
    public void remakeModelMatrix(){
      Matrix.setIdentityM(mModelMatrix, 0);
      Matrix.scaleM(mModelMatrix, 0, scale[0], scale[1], scale[2]);
      Matrix.scaleM(mModelMatrix, 0, autoScale[0], autoScale[1], autoScale[2]);
      Matrix.translateM(mModelMatrix, 0, getX(), getY(), getZ());
      Matrix.rotateM(mModelMatrix, 0, dir[0], 1.0f, 0.0f, 0.0f);
      Matrix.rotateM(mModelMatrix, 0, dir[1], 0.0f, 1.0f, 0.0f);
      Matrix.rotateM(mModelMatrix, 0, dir[2], 0.0f, 0.0f, 1.0f);
    }
    
    public void createSquare(float width, float height){
      width /= 2f;
      height /= 2f;
      float[] squareCoords = { -width,  height, 0f,
                     -width, -height, 0f,
                      width, -height, 0f,
                      width,  height, 0f };
      float[] squareNormals = { 0.0f, 0.0f, 1.0f,
                    0.0f, 0.0f, 1.0f,
                    0.0f, 0.0f, 1.0f,
                    0.0f, 0.0f, 1.0f};
      float[] textureCoords = { 0.0f,  0.0f,
                         0.0f,  1.0f,
                         1.0f,  1.0f,
                         1.0f,  0.0f };
         short[] squareDrawOrder = { 0, 1, 2, 0, 2, 3 };
         setupModel(squareCoords, squareNormals, textureCoords, squareDrawOrder);
    }
    
    public void set(float x, float y, float width, float height){
      setCoordinates(x,y);
      setDimensions(width,height);
      imageSingle = 0f;
        imageSpeed = 1f;
        //mTextureDataHandle = mySprite.getSprite(getImageSingle());
        setHudElement(false);
        for (int i = 0; i < 3; i++){
          setDir(i, 0);
          setNewDir(i, 0);
        }
        set = true;
        visible = true;
    }
    
    public void setSpin(boolean spin){
      this.spin = spin;
    }
    
    public boolean getSpin(){
      return spin;
    }
    
    public void setDir(int xyz, float dir){
      this.dir[xyz] = dir;
      remakeModelMatrix();
    }
    
    public void setFDir(int xyz, float dir){
      this.dir[xyz] = dir;
      setNewDir(xyz, dir);
      remakeModelMatrix();
    }
    
    public float getDir(int xyz){
      return dir[xyz];
    }
    
    public void setNewDir(int xyz, float newDir){
      this.newDir[xyz] = newDir;
    }
    
    public void free(){
      set = false;
      visible = false;
    }
    
    public void setSprite(Sprite sprite){
      this.myTextureSprite = sprite;
      imageSingle = 0;
    }
    
    public Sprite getSprite(){
      return myTextureSprite;
    }
    
    public int getImageSingle(){
      return (int)imageSingle;
    }
    
    public void setColor(float red, float green, float blue, float alpha){
      this.color[0] = red;
      this.color[1] = green;
      this.color[2] = blue;
      this.color[3] = alpha;
    }
    
    public void setScale(float sx, float sy, float sz){
      scale[0] = sx;
      scale[1] = sy;
      scale[2] = sz;
      remakeModelMatrix();
    }
    
    public void resetColor(){
      setColor(0.75f,
           0.75f,
           0.75f, 
           1.00f );
    }
    
    public void scaleSprite(float widthStart, float widthEnd, float heightStart, float heightEnd){
      texCoords[0] = widthStart;
      texCoords[0] = heightEnd;
      texCoords[0] = widthStart;
      texCoords[0] = heightStart;
      texCoords[0] = widthEnd;
      texCoords[0] = heightStart;
      texCoords[0] = widthEnd;
      texCoords[0] = heightEnd;
      mTextureCoordinates.put(texCoords).position(0);
    }
    
    public void setHudElement(boolean h){
      this.hudElement = h;
      if (h)
        setAutoScaleX(1/GameRenderer.s_instance.getRatio());
      else
        setAutoScaleX(1f);
    }
    
    public void setScaleX(float sx){
      scale[0] = sx;
    }
    
    public void setAutoScaleX(float sx){
      autoScale[0] = sx;
    }
    
    public boolean getHudElement(){
      return hudElement;
    }
    
    public void setVisible(boolean visible){
      this.visible = visible;
    }
    
    public boolean getVisible(){
      return visible;
    }
    
    public void increment(){
      imageSingle += imageSpeed;
      if (imageSingle >= myTextureSprite.getSpriteLength())
        imageSingle = 0;
    }
    
    public void setImageSingle(int single){
      imageSingle = single;
    }
    
    public float getImageSpeed(){
      return imageSpeed;
    }
    
    public void setImageSpeed(float speed){
      imageSpeed = speed;
    }
    
    public void draw(float[] vpMatrix) {
      //int width = GameRenderer.s_instance.getScreenWidth()/2;
      //int height = GameRenderer.s_instance.getScreenHeight()/2;
      if (set && getVisible() && (getHudElement() || true/* (getRight() >= centerX-width*centerZ/3 && getLeft() <= centerX + width*centerZ/3 && getBottom() >= centerY-height*centerZ/3 && getTop() <= centerY+height*centerZ/3)*/)){
        increment();
            mTextureDataHandle = myTextureSprite.getSprite(getImageSingle());
        
            //remakeModelMatrix();
            for (int i = 0; i < 3; i++){
              if (newDir[i] != dir[i]){
                if (Math.abs(newDir[i]-dir[i]) < 20)
                  setDir(i, newDir[i]);
                else if ((newDir[i] > dir[i] && Math.abs(newDir[i]-dir[i]) < 180) || (newDir[i] < dir[i] && Math.abs(newDir[i]-dir[i]) > 180))
                  setDir(i, dir[i]+10);
                else if ((newDir[i] < dir[i] && Math.abs(newDir[i]-dir[i]) < 180) || (newDir[i] > dir[i] && Math.abs(newDir[i]-dir[i]) > 180))
                  setDir(i, dir[i]-10);
              }
            if (dir[i] > 180)
                dir[i] -= 360;
            else if (dir[i] < -180)
                 dir[i] += 360;
            }

          // Add program to OpenGL environment
          GLES20.glUseProgram(mProgram);
          MyGLRenderer.checkGlError("glGetUniformLocation");
          // get handle to vertex shader's vPosition member
          mPositionHandle = GLES20.glGetAttribLocation(mProgram, "vPosition");

          // Enable a handle to the triangle vertices
          GLES20.glEnableVertexAttribArray(mPositionHandle);

          // Prepare the triangle coordinate data
          GLES20.glVertexAttribPointer(mPositionHandle, COORDS_PER_VERTEX,
                                       GLES20.GL_FLOAT, false,
                                       vertexStride, vertexBuffer);

          // get handle to fragment shader's vColor member
          mColorHandle = GLES20.glGetUniformLocation(mProgram, "vColor");

          // Set color for drawing the triangle
          GLES20.glUniform4fv(mColorHandle, 1, color, 0);
          
          //Normals
          mNormalHandle = GLES20.glGetAttribLocation(mProgram, "a_normal");
          normalBuffer.position(0);
          GLES20.glVertexAttribPointer(mNormalHandle, COORDS_PER_VERTEX, GLES20.GL_FLOAT, false, 0, normalBuffer);
          GLES20.glEnableVertexAttribArray(mNormalHandle);
          
          /* */
          //Set Texture Handles and bind Texture
          mTextureUniformHandle = GLES20.glGetAttribLocation(mProgram, "u_Texture");
          mTextureCoordinateHandle = GLES20.glGetAttribLocation(mProgram, "a_TexCoordinate");


          //Set the active texture unit to texture unit 0.
          GLES20.glActiveTexture(GLES20.GL_TEXTURE0);

          //Bind the texture to this unit.
          GLES20.glBindTexture(GLES20.GL_TEXTURE_2D, mTextureDataHandle);

          //Tell the texture uniform sampler to use this texture in the shader by binding to texture unit 0.
          GLES20.glUniform1i(mTextureUniformHandle, 0); 

          //Pass in the texture coordinate information
          mTextureCoordinates.position(0);
          GLES20.glVertexAttribPointer(mTextureCoordinateHandle, mTextureCoordinateDataSize, GLES20.GL_FLOAT, false, 0, mTextureCoordinates);
          GLES20.glEnableVertexAttribArray(mTextureCoordinateHandle);
          /* */
          
          GLES20.glBlendFunc(GLES20.GL_ONE, GLES20.GL_ONE_MINUS_SRC_ALPHA);
          GLES20.glEnable(GLES20.GL_BLEND);
          
          //Pass in lights
          lightPosHandle = GLES20.glGetUniformLocation(mProgram, "lightPos");
          lightColorHandle = GLES20.glGetUniformLocation(mProgram, "lightColor");
          GLES20.glUniform4f(lightPosHandle, 50.0f, 50.0f, 500.0f, 1.0f);
          GLES20.glUniform4f(lightColorHandle, 200000.0f, 200000.0f, 200000.0f, 1.0f);
  
          // get handle to shape's transformation matrixs
          mMMatrixHandle = GLES20.glGetUniformLocation(mProgram, "uMMatrix");
          mVPMatrixHandle = GLES20.glGetUniformLocation(mProgram, "uVPMatrix");
          MyGLRenderer.checkGlError("glGetUniformLocation");
          
          // Apply the projection and view transformation
          if (!getHudElement()) {
            GLES20.glUniformMatrix4fv(mMMatrixHandle, 1, false, mModelMatrix, 0);
            GLES20.glUniformMatrix4fv(mVPMatrixHandle, 1, false, vpMatrix, 0);
          } else {
            GLES20.glUniformMatrix4fv(mMMatrixHandle, 1, false, mModelMatrix, 0);
            GLES20.glUniformMatrix4fv(mVPMatrixHandle, 1, false, identityMatrix, 0);
          }
          MyGLRenderer.checkGlError("glUniformMatrix4fv");
  
          // Draw the square
          GLES20.glDrawElements(GLES20.GL_TRIANGLES, drawOrder.length,
                                GLES20.GL_UNSIGNED_SHORT, drawListBuffer);
          
          // Disable vertex array
          GLES20.glDisableVertexAttribArray(mPositionHandle);
          GLES20.glDisableVertexAttribArray(mNormalHandle);
          GLES20.glDisableVertexAttribArray(mTextureCoordinateHandle);
      }
    }
    
    
}

Java Source Code List

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