Monday, May 28, 2012

Perform transform of Translate and Rotate on RenderScript

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

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