openGL es2.0 创建颜色平面和文理平面

浅浅的花香味﹌ 2022-08-06 11:08 234阅读 0赞

一、创建颜色平面的Java代码和Shader Language：

  1. package com.gzdxid.utils;
  3. import java.nio.ByteBuffer;
  4. import java.nio.ByteOrder;
  5. import java.nio.FloatBuffer;
  7. import android.opengl.GLES20;
  10. public class DrawRectColor {
  11.     int mProgram;
  12.     int muMVPMatrixHandle;
  13.     int maPositionHandle;
  15.     int muColorRHandle;
  16.     int muColorGHandle;
  17.     int muColorBHandle;
  18.     int muColorAHandle;
  20.     FloatBuffer mVertexBuffer;
  21.     int vCount = 0;
  22.     float r,g,b,a;
  24.     public DrawRectColor(float width,float height,int mProgam) {
  25.         initVertexData(width,height);
  26.         intShader(mProgam);
  27.     }
  29.     private void initVertexData(float width,float height) {
  30.         // TODO Auto-generated method stub
  31.         vCount = 6;
  32.         float w = width / 2;
  33.         float h = height / 2;
  34.         float vertices[] = new float[] { 
  35.         -w,  h, 0,
  36.         -w, -h, 0,
  37.          w, -h, 0,
  38.          w, -h, 0,
  39.          w,  h, 0,
  40.         -w,  h, 0,
  42.         };
  43.         ByteBuffer vbb = ByteBuffer.allocateDirect(vertices.length * 4);
  44.         vbb.order(ByteOrder.nativeOrder());
  45.         mVertexBuffer = vbb.asFloatBuffer();
  46.         mVertexBuffer.put(vertices);
  47.         mVertexBuffer.position(0);
  50.     }
  52.     private void intShader(int mProgram) {
  53.         // TODO Auto-generated method stub
  54.         this.mProgram=mProgram;
  55.         muMVPMatrixHandle=GLES20.glGetUniformLocation(mProgram, "uMVPMatrix");
  56.         maPositionHandle=GLES20.glGetAttribLocation(mProgram, "aPosition");
  57.         muColorRHandle=GLES20.glGetUniformLocation(mProgram, "uColorR");
  58.         muColorGHandle=GLES20.glGetUniformLocation(mProgram, "uColorG");
  59.         muColorBHandle=GLES20.glGetUniformLocation(mProgram, "uColorB");
  60.         muColorAHandle=GLES20.glGetUniformLocation(mProgram, "uColorA");
  62.     }
  64.     public void drawSelf(float r,float g,float b,float a){
  65.         GLES20.glUseProgram(mProgram);
  66.         GLES20.glUniformMatrix4fv(muMVPMatrixHandle, 1, false, MatrixState.getFinalMatrix(), 0);
  67.         GLES20.glUniform1f(muColorRHandle, r);
  68.         GLES20.glUniform1f(muColorGHandle, g);
  69.         GLES20.glUniform1f(muColorBHandle, b);
  70.         GLES20.glUniform1f(muColorAHandle, a);
  71.         GLES20.glVertexAttribPointer(maPositionHandle, 3, GLES20.GL_FLOAT, false, 3*4, mVertexBuffer);
  72.         GLES20.glEnableVertexAttribArray(maPositionHandle);
  73.         GLES20.glDrawArrays(GLES20.GL_TRIANGLES, 0, vCount);
  74.     }
  77. }

定点着色器代码： 

  1. uniform mat4 uMVPMatrix;
  2. attribute vec3 aPosition;
  4. void main(){
  5.     gl_Position=uMVPMatrix*vec4(aPosition,1); 
  6. }

片源着色器代码： 

  1. precision mediump float;
  3. uniform float uColorR;
  4. uniform float uColorG;
  5. uniform float uColorB;
  6. uniform float uColorA;
  8. void main(){
  9.     vec4 finalColor;
  10.     finalColor=vec4(uColorR,uColorG,uColorB,uColorA);
  11.     gl_FragColor=finalColor;
  12. }

二、创建文理平面的Java代码和Shader Language：

  1. package com.gzdxid.utils;
  3. import java.nio.ByteBuffer;
  4. import java.nio.ByteOrder;
  5. import java.nio.FloatBuffer;
  7. import android.opengl.GLES20;
  9. public class DrawRectTexture {
  10.     int mProgram;
  11.     int muMVPMatrixHandle;
  12.     int maPositionHandle;
  13.     int maTexCoorHandle;
  15.     FloatBuffer mVertexBuffer;
  16.     FloatBuffer mTexCoorBuffer;
  18.     int vCount = 0;
  20.     public DrawRectTexture(float width, float height, int mProgam) {
  21.         // TODO Auto-generated constructor stub
  22.         initVertexData(width, height);
  23.         intShader(mProgam);
  24.     }
  26.     private void initVertexData(float width, float height) {
  27.         // TODO Auto-generated method stub
  28.         vCount = 6;
  29.         float w = width / 2;
  30.         float h = height / 2;
  31.         float vertices[] = new float[] { 
  32.         -w,  h, 0,
  33.         -w, -h, 0,
  34.          w, -h, 0,
  35.          w, -h, 0,
  36.          w,  h, 0,
  37.         -w,  h, 0,
  39.         };
  40.         ByteBuffer vbb = ByteBuffer.allocateDirect(vertices.length * 4);
  41.         vbb.order(ByteOrder.nativeOrder());
  42.         mVertexBuffer = vbb.asFloatBuffer();
  43.         mVertexBuffer.put(vertices);
  44.         mVertexBuffer.position(0);
  46.         float texCoor[] = new float[] { 0, 0, 0, 1, 1, 1, 1, 1, 1, 0, 0, 0 };
  47.         ByteBuffer cbb = ByteBuffer.allocateDirect(texCoor.length * 4);
  48.         cbb.order(ByteOrder.nativeOrder());
  49.         mTexCoorBuffer = cbb.asFloatBuffer();
  50.         mTexCoorBuffer.put(texCoor);
  51.         mTexCoorBuffer.position(0);
  53.     }
  55.     private void intShader(int mProgam) {
  56.         // TODO Auto-generated method stub
  57.         this.mProgram = mProgam;
  58.         muMVPMatrixHandle = GLES20.glGetUniformLocation(mProgam, "uMVPMatrix");
  59.         maPositionHandle = GLES20.glGetAttribLocation(mProgam, "aPosition");
  60.         maTexCoorHandle = GLES20.glGetAttribLocation(mProgam, "aTexCoor");
  61.     }
  63.     public void drawSelf(int texId) {
  64.         GLES20.glUseProgram(mProgram);
  65.         GLES20.glUniformMatrix4fv(muMVPMatrixHandle, 1, false, MatrixState.getFinalMatrix(), 0);
  66.         GLES20.glVertexAttribPointer(maPositionHandle, 3, GLES20.GL_FLOAT, false, 3 * 4, mVertexBuffer);
  67.         GLES20.glVertexAttribPointer(maTexCoorHandle, 2, GLES20.GL_FLOAT, false, 2 * 4, mTexCoorBuffer);
  68.         GLES20.glEnableVertexAttribArray(maPositionHandle);
  69.         GLES20.glEnableVertexAttribArray(maTexCoorHandle);
  70.         GLES20.glActiveTexture(GLES20.GL_TEXTURE0);
  71.         GLES20.glBindTexture(GLES20.GL_TEXTURE_2D, texId);
  72.         GLES20.glDrawArrays(GLES20.GL_TRIANGLES, 0, vCount);
  73.     }
  75. }

定点着色器代码： 

  1. uniform mat4 uMVPMatrix;
  2. attribute vec3 aPosition;
  3. attribute vec2 aTexCoor;
  4. varying vec2 vTextureCoord;
  6. void main(){
  7.     gl_Position=uMVPMatrix*vec4(aPosition,1); 
  8.     vTextureCoord=aTexCoor;
  9. }

片源着色器代码： 

  1. precision mediump float;
  3. varying vec2 vTextureCoord;
  4. uniform sampler2D sTexture;
  6. void main(){
  7.     gl_FragColor=texture2D(sTexture,vTextureCoord);
  8. }

发表评论

表情：
评论列表 （有 0 条评论，234人围观）

还没有评论，来说两句吧...

相关阅读

    相关 平面分割

    平面分割 描述 Description 【问题描述】 　　同一平面内有n（n≤500）条直线，已知其中p（p≥2）条直线相交于同一点，则这n条直线最多能将平面分割成

    ╰半夏微凉°╰半夏微凉°/ 0 赞/ 314 阅读