RenderMonkey学习之rfx文件转换成Java代码

先看效果图：左图为rm的文件，右图为我在Android系统设备上的改进图。

                                                                   

第一步：打开AMD\RenderMonkey 1.82\Examples\GL2\Particle System.rfx，在Snake_OpenGL上面单击右键，set as active effect.出现上面左图效果。查看相关代码。

第二步：在Eclipse里面编写自己的shader：参考rm里面的shader。这是学习rm的核心地方。

1、定点着色器：

uniform mat4 uMVPMatrix;uniform mat4 uMMatrix;uniform float uTime;uniform float uLong;attribute vec3 aPosition;varying vec2 vTexCoord;varying float vColor;void main(){    vTexCoord=aPosition.xy;    vColor   =aPosition.z;        vec3 position;    position=15.0*aPosition.z*(aPosition.x*vec3(uMMatrix[0][0],uMMatrix[1][0],uMMatrix[2][0])+                               aPosition.y*vec3(uMMatrix[0][1],uMMatrix[1][1],uMMatrix[2][1]));    float t=uTime*1.0+uLong*aPosition.z;    position.x+=10.0*cos(t);    position.y+=10.0*sin(t);        gl_Position=uMVPMatrix*vec4(position,1.0);}

2、片源着色器：

precision mediump float;uniform float uParticleExp;uniform sampler2D uPalette;varying vec2 vTexCoord;varying float vColor;void main(){     gl_FragColor=(1.0-pow(dot(vTexCoord,vTexCoord),uParticleExp))*     texture2D(uPalette,vec2(vColor,0.0));}

第三步：画单条线

package com.gzdxid.particles;import java.nio.FloatBuffer;import com.gzdxid.utils.MatrixState;import com.gzdxid.utils.UtilBufferTransfer;import android.opengl.GLES20;public class DrawParticleSnake {int mProgram;int muMVPMatrixHandle;int muMMatrixHandle;int muTimeHandle;int muLongHandle;int muParticleExpHandle;int maPositionHandle;FloatBuffer mVertexBuffer;int vCount = 0;public DrawParticleSnake(float[] vertices, int mProgram) {// TODO Auto-generated constructor stubinitVertex(vertices);initShader(mProgram);}private void initVertex(float[] vertices) {// TODO Auto-generated method stubvCount = vertices.length / 3;mVertexBuffer = UtilBufferTransfer.getFloatBuffer(vertices);}private void initShader(int mProgram) {// TODO Auto-generated method stubthis.mProgram = mProgram;muMVPMatrixHandle = GLES20.glGetUniformLocation(mProgram, "uMVPMatrix");muMMatrixHandle = GLES20.glGetUniformLocation(mProgram, "uMMatrix");muTimeHandle = GLES20.glGetUniformLocation(mProgram, "uTime");muLongHandle=GLES20.glGetUniformLocation(mProgram, "uLong");muParticleExpHandle = GLES20.glGetUniformLocation(mProgram, "uParticleExp");maPositionHandle = GLES20.glGetAttribLocation(mProgram, "aPosition");}public void drawSelf(float time,float length, float exp, int texId) {GLES20.glUseProgram(mProgram);GLES20.glUniformMatrix4fv(muMVPMatrixHandle, 1, false, MatrixState.getFinalMatrix(), 0);GLES20.glUniformMatrix4fv(muMMatrixHandle, 1, false, MatrixState.getMMatrix(), 0);GLES20.glUniform1f(muTimeHandle, time);GLES20.glUniform1f(muLongHandle, length);GLES20.glUniform1f(muParticleExpHandle, exp);GLES20.glVertexAttribPointer(maPositionHandle, 3, GLES20.GL_FLOAT, false, 3 * 4, mVertexBuffer);GLES20.glEnableVertexAttribArray(maPositionHandle);GLES20.glActiveTexture(GLES20.GL_TEXTURE0);GLES20.glBindTexture(GLES20.GL_TEXTURE_2D, texId);GLES20.glDrawArrays(GLES20.GL_TRIANGLES, 0, vCount);}}

第四步：画球

package com.gzdxid.particles;import com.gzdxid.utils.DrawBallColorLight;import com.gzdxid.utils.MatrixState;import com.gzdxid.utils.ShaderManager;import com.gzdxid.utils.UtilLoad;import android.content.res.Resources;import android.opengl.GLES20;public class DrawParticleBall {private DrawParticleSnake snake = null;private DrawBallColorLight ball = null;private float scale;//private int sankeNum = 8;public DrawParticleBall(float scale, Resources r) {// TODO Auto-generated constructor stubthis.scale = scale;snake = new DrawParticleSnake(UtilLoad.loadVertexOnly("obj_quard_array.obj", r), ShaderManager.getParticleSnakeProgram());ball = new DrawBallColorLight(0.5f, ShaderManager.getLightColorShaderProgram());}public void drawSelf(float time, float length, float exp, int texId, float r, float g, float b, float a) {GLES20.glEnable(GLES20.GL_DEPTH_TEST);DrawBall(r, g, b, a);drawSnake(time, length, exp, texId);GLES20.glDisable(GLES20.GL_DEPTH_TEST);}private void drawSnake(float time, float length, float exp, int texId) {sanke_1(time, length, exp, texId);//sanke_2(time, length, exp, texId);}/*private void sanke_2(float time, float length, float exp, int texId) {// TODO Auto-generated method stubGLES20.glEnable(GLES20.GL_BLEND);GLES20.glBlendFunc(GLES20.GL_ONE, GLES20.GL_ONE);GLES20.glDepthMask(false);MatrixState.pushMatrix();MatrixState.scale(0.06f * scale, 0.06f * scale, 0.06f * scale);//-------------start--------------MatrixState.pushMatrix();for(int i=0;i<6;i++){MatrixState.rotate(360/6, 1, 0, 0);MatrixState.pushMatrix();MatrixState.rotate(0, 0, 0, 1);snake.drawSelf(time, length, exp, texId);MatrixState.rotate(90, 0, 0, 1);snake.drawSelf(time, length, exp, texId);MatrixState.rotate(90, 0, 0, 1);snake.drawSelf(time, length, exp, texId);MatrixState.rotate(90, 0, 0, 1);snake.drawSelf(time, length, exp, texId);MatrixState.rotate(10, 0, 1, 0);MatrixState.popMatrix();}MatrixState.popMatrix();//-----------------end-------------MatrixState.popMatrix();GLES20.glDisable(GLES20.GL_BLEND);GLES20.glDepthMask(true);}*/private void sanke_1(float time, float length, float exp, int texId) {GLES20.glEnable(GLES20.GL_BLEND);GLES20.glBlendFunc(GLES20.GL_ONE, GLES20.GL_ONE);GLES20.glDepthMask(false);MatrixState.pushMatrix();MatrixState.scale(0.03f * scale, 0.03f * scale, 0.03f * scale);for(int i=0;i<360;i+=10){MatrixState.pushMatrix();MatrixState.rotate(i, 1, 0, 0);snake.drawSelf(time, length, exp, texId);MatrixState.popMatrix();}MatrixState.popMatrix();GLES20.glDisable(GLES20.GL_BLEND);GLES20.glDepthMask(true);}private void DrawBall(float r, float g, float b, float a) {// TODO Auto-generated method stubGLES20.glEnable(GLES20.GL_BLEND);GLES20.glBlendFunc(GLES20.GL_SRC_ALPHA, GLES20.GL_ONE_MINUS_SRC_ALPHA);MatrixState.pushMatrix();MatrixState.scale(0.1f * scale, 0.1f * scale, 0.1f * scale);ball.drawSelf(r, g, b, a);MatrixState.popMatrix();GLES20.glDisable(GLES20.GL_BLEND);}}

第四步：在onDrawFrame里面调用

                                MatrixState.pushMatrix();particleBall.drawSelf(uTime,7.0f,0.1f, snakeBitmap[0], 0.2f, 0.2f, 0.8f, 0.3f);MatrixState.popMatrix();

注意：

1、结合http://blog.csdn.net/sh15285118586/article/details/43671613和另外一篇OpenGL es2.0 配置自己的matrix一起看。

2、里面的三维模型要用3D exploration转换成obj文件。

3、下面参数的对应在上面

private void sanke_1(float time, float length, float exp, int texId)这个函数中。非常重要！

最后补加载obj文件代码：

public static float[] loadVertexOnly(String fname,Resources r){float[] result=null;try {InputStream is=r.getAssets().open(fname);InputStreamReader isReader=new InputStreamReader(is);BufferedReader br=new BufferedReader(isReader);String temps=null;while((temps=br.readLine())!=null){String []tempsa=temps.split("[ ]+");if(tempsa[0].trim().equals("v")){alv.add(Float.parseFloat(tempsa[1]));alv.add(Float.parseFloat(tempsa[2]));alv.add(Float.parseFloat(tempsa[3]));}else if (tempsa[0].trim().equals("f")) { for(int i=1;i<4;i++){ index=Integer.parseInt(tempsa[i].split("/")[0])-1; x=alv.get(3*index); y=alv.get(3*index+1); z=alv.get(3*index+2); alvResult0.add(x); alvResult0.add(y); alvResult0.add(z); }}}int vsize0 = alvResult0.size();result = new float[vsize0];for (int i = 0; i < vsize0; i++) {result[i] = alvResult0.get(i);}clearAll();} catch (Exception e) {// TODO: handle exceptionLog.d("load error","load error");e.printStackTrace();}return result;}