public static void render(GL2ES1 gl, int width, int height) {
gl.glClear(GL.GL_COLOR_BUFFER_BIT);
// draw a triangle filling the window
gl.glLoadIdentity();
ImmModeSink immModeSink =
ImmModeSink.createFixed(
3 * 3,
3,
GL.GL_FLOAT, // vertex
3,
GL.GL_FLOAT, // color
0,
GL.GL_FLOAT, // normal
0,
GL.GL_FLOAT, // texCoords
GL.GL_STATIC_DRAW);
immModeSink.glBegin(GL.GL_TRIANGLES);
immModeSink.glColor3f(1, 0, 0);
immModeSink.glVertex2f(0, 0);
immModeSink.glColor3f(0, 1, 0);
immModeSink.glVertex2f(width, 0);
immModeSink.glColor3f(0, 0, 1);
immModeSink.glVertex2f(width / 2, height);
immModeSink.glEnd(gl, true);
}
public static void setup(GL2ES1 gl, int width, int height) {
gl.glMatrixMode(GL2ES1.GL_PROJECTION);
gl.glLoadIdentity();
// coordinate system origin at lower left with width and height same as the window
GLU glu = new GLUgl2es1();
glu.gluOrtho2D(0.0f, width, 0.0f, height);
gl.glMatrixMode(GL2ES1.GL_MODELVIEW);
gl.glLoadIdentity();
gl.glViewport(0, 0, width, height);
}
/**
* Setup the viewport correctly in case it was changed.
*
* @param drawable the GLAutoDrawable object to access openGL
*/
@SuppressWarnings("nls")
private void setupViewport(final GLAutoDrawable drawable) {
if (drawable.getContext() == null) {
return;
}
boolean releaseContext = false;
if (GLContext.getCurrent() == null) {
drawable.getContext().makeCurrent();
releaseContext = true;
}
GL2ES1 gl = null;
if (drawable.getGLProfile().hasGLSL()) {
gl = FixedFuncUtil.getFixedFuncImpl(drawable.getGL());
} else if (drawable.getGLProfile().isGL2ES1()) {
gl = drawable.getGL().getGL2ES1();
} else {
if (releaseContext) {
drawable.getContext().release();
}
throw new GraphicsJOGLException(
"Invalid GL profile. Failed to setup Viewport.", drawable.getGLProfile());
}
gl.glViewport(0, 0, drawable.getWidth(), drawable.getHeight());
gl.glMatrixMode(GLMatrixFunc.GL_PROJECTION);
gl.glLoadIdentity();
gl.glOrtho(0, drawable.getWidth(), drawable.getHeight(), 0, -9999, 9999);
// GLU.createGLU().gluOrtho2D(0, drawable.getWidth(), 0,
// drawable.getHeight());
gl.glMatrixMode(GLMatrixFunc.GL_MODELVIEW);
gl.glLoadIdentity();
if (releaseContext) {
drawable.getContext().release();
}
}