Hi,
for selection I´m using the color picking method, the rendering etc. is working fine but I get the wrong colors.
var back_colors = [
// Front face
224/255, 0.0, 0.0, 255/255,
224/255, 0.0, 0.0, 255/255,
224/255, 0.0, 0.0, 255/255,
222/255, 0.0, 0.0, 255/255,
222/255, 0.0, 0.0, 255/255,
222/255, 0.0, 0.0, 255/255,
222/255, 0.0, 0.0, 255/255,
222/255, 0.0, 0.0, 255/255,
222/255, 0.0, 0.0, 255/255,
222/255, 0.0, 0.0, 255/255,
222/255, 0.0, 0.0, 255/255,
222/255, 0.0, 0.0, 255/255
];
gl.bufferData(gl.ARRAY_BUFFER, new Float32Array(back_colors), gl.STATIC_DRAW);
So the reference page states regarding “glReadPixels” : “When type is GL_UNSIGNED_BYTE, each component is multiplied by 2^8 -1” (OpenGL ES 2.0 Reference Pages).
So for the reading I coded:
var element_color = new Uint8Array(gl.viewportWidth * gl.viewportHeight * 4);
gl.readPixels(window_x, window_y, gl.viewportWidth, gl.viewportHeight, gl.RGBA, gl.UNSIGNED_BYTE, element_color);
So for Red I would expect a value of 224 or 222 but what I get is 221.
Whats going on?
Greetings S.