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Quellcode

import javax.microedition.khronos.opengles.GL11;


public class Matrix
{
    
    private static float matrix[] = new float[16];
    private static float identityMatrix[] = {1, 0, 0, 0,    0, 1, 0, 0,     0, 0, 1, 0,     0, 0, 0, 1};
    
    static void resetMatrix()
    {
        matrix = identityMatrix.clone();
    }
    
    static void transformMatrix(GL11 gl, float translation[], float rotation[])
    {
        gl.glPushMatrix();
        gl.glLoadMatrixf(matrix, 0);
        
        
        gl.glRotatef(rotation[0], 1, 0, 0);
        gl.glRotatef(rotation[1], 0, 1, 0);
        gl.glRotatef(rotation[2], 0, 0, 1);
        gl.glTranslatef(translation[0], translation[1], translation[2]);
        
        gl.glGetFloatv(GL11.GL_MODELVIEW_MATRIX, matrix, 0);
        gl.glPopMatrix();
    }
    
    public static float[] getWorldCoordinates(float vertices[])
    {
        for(int i = 0; i < vertices.length / 3; i++)
        {
            int idx1 = i*3 + 0;
            int idx2 = i*3 + 1;
            int idx3 = i*3 + 2;
            
            float vec[] = {vertices[idx1], vertices[idx2], vertices[idx3]};
            
            
            float mtx[] = matrix;
            
            vertices[idx1] = (vec[0] * mtx[0]) + (vec[1] * mtx[4]) + (vec[2] * mtx[8])  + mtx[12];
            vertices[idx2] = (vec[0] * mtx[1]) + (vec[1] * mtx[5]) + (vec[2] * mtx[9])  + mtx[13];
            vertices[idx3] = (vec[0] * mtx[2]) + (vec[1] * mtx[6]) + (vec[2] * mtx[10]) + mtx[14];
        }
        
        
        
        return vertices;
    }
    
}