public final void glPopMatrix() {
float[] stackEntry = null;
if (matrixMode == GL_MODELVIEW) {
stackEntry = matrixMvStack.remove(0);
} else if (matrixMode == GL_PROJECTION) {
stackEntry = matrixPStack.remove(0);
} else if (matrixMode == GL.GL_TEXTURE) {
stackEntry = matrixTStack.remove(0);
}
glLoadMatrixf(stackEntry, 0);
}
public void lookat(
float eyeX,
float eyeY,
float eyeZ,
float centerX,
float centerY,
float centerZ,
float upX,
float upY,
float upZ,
PMVMatrix matrix) {
Vec3 f = new Vec3(centerX - eyeX, centerY - eyeY, centerZ - eyeZ);
f.Nor();
Vec3 U = new Vec3(upX, upY, upZ);
U.Nor();
Vec3 s = f.Cro(U);
s.Nor();
Vec3 u = s.Cro(f);
u.Nor();
float[] mat = {
s.x,
u.x,
-f.x,
0,
s.y,
u.y,
-f.y,
0,
s.z,
u.z,
-f.z,
0,
-eyeX * s.x + -eyeY * s.y + -eyeZ * s.z,
-eyeX * u.x + -eyeY * u.y + -eyeZ * u.z,
-eyeX * -f.x + -eyeY * -f.y + -eyeZ * -f.z,
1
};
matrix.glMatrixMode(GL2.GL_MODELVIEW);
matrix.glLoadMatrixf(mat, 0);
}
public void lookatd(
double eyeX,
double eyeY,
double eyeZ,
double centerX,
double centerY,
double centerZ,
double upX,
double upY,
double upZ) {
Vec3d f = new Vec3d(centerX - eyeX, centerY - eyeY, centerZ - eyeZ);
f.Nor();
Vec3d U = new Vec3d(upX, upY, upZ);
U.Nor();
Vec3d s = f.Cro(U);
s.Nor();
Vec3d u = s.Cro(f);
u.Nor();
float[] mat = {
(float) s.x,
(float) u.x,
(float) -f.x,
0,
(float) s.y,
(float) u.y,
(float) -f.y,
0,
(float) s.z,
(float) u.z,
(float) -f.z,
0,
(float) (-eyeX * s.x + -eyeY * s.y + -eyeZ * s.z),
(float) (-eyeX * u.x + -eyeY * u.y + -eyeZ * u.z),
(float) (-eyeX * -f.x + -eyeY * -f.y + -eyeZ * -f.z),
1
};
pvmat.glMatrixMode(GL2.GL_MODELVIEW);
pvmat.glLoadMatrixf(mat, 0);
}