Perform transform of Translate and Rotate on RenderScript

Modify RenderScript.rs of last exercise "Program Renderscript on Android" to perform transform of Translate and Rotate - to rotate the rendered triangle.

RenderScript.rs

//declare RendorScript Version
#pragma version(1)

//declare package
#pragma rs java_package_name(com.exercise.AndroidRenderScript);

//include graphics library
#include "rs_graphics.rsh"

rs_mesh my_rs_mesh;

float rotation;

void init(){
 rotation = 0.0f;
}

int root(){
 //set background color
 rsgClearColor(0.0f, 0.0f, 0.0f, 0.0f);
 
 //Transform something
 rs_matrix4x4 matrix;
 rsMatrixLoadIdentity(&matrix);
 rsMatrixTranslate(&matrix, 100.0f, 100.0f, 0.0f);
 rsMatrixRotate(&matrix, rotation++, 0.0f, 0.0f, 1.0f);
 rsgProgramVertexLoadModelMatrix(&matrix);
 
 //draw something
 rsgDrawMesh(my_rs_mesh);
 
 //repeat 20ms
 return 20;
}

Download the files.

Next:
- Draw square in Android RenderScript