在 pyxel 复古游戏中获取像素的颜色

Question

I am writing a simple shooting game using Pyxel, where an enemy shows up randomly on the screen. I already implemented a strategy to detect if a given shot hit the enemy or not, but a much simpler solution for me would be to check the color of a pixel on the screen under the mouse coordinates. I did not find an API function to do that.

I checked the source code of the Renderer module ( https://github.com/kitao/pyxel/blob/master/pyxel/renderer.py ) and found a call to the OpenGL lib:

capture_image = gl.glReadPixels(
            0, 0, self._width, self._height, gl.GL_RGB, gl.GL_UNSIGNED_BYTE)

I tried to do the same on my script like so:

capture_image = gl.glReadPixels(
            pyxel.mouse_x, pyxel.mouse_y, 1, 1, gl.GL_RGB, gl.GL_UNSIGNED_BYTE)

but no matter when I call the gl.glReadPixels(..) I always get the background color.

Is there a way to get the color of a single pixel on the screen on a pyxel script?

Answer 1

Have you tried:

capture_image = gl.glReadPixels(
        pyxel.mouse_x, 
        window_height - pyxel.mouse_y,
        1, 1, gl.GL_RGB, gl.GL_UNSIGNED_BYTE)

Answer 2

获取 ( x , y ) 处像素的颜色：

pget(x, y)