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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;
}
}
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