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import os
import glm
import moderngl
import moderngl_window as mglw
class Example(mglw.WindowConfig):
title = 'Resource Loading with ModernGL Window'
resizable = False
gl_version = (3, 3)
window_size = (800, 800)
aspect_ratio = 1.0
resource_dir = os.path.normpath(os.path.join(__file__, '../data'))
def __init__(self, **kwargs):
super().__init__(**kwargs)
self.program = self.ctx.program(
vertex_shader='''
#version 330 core
vec2 positions[3] = vec2[](
vec2(-1.0, -1.0),
vec2(3.0, -1.0),
vec2(-1.0, 3.0)
);
out vec2 v_uv;
void main() {
gl_Position = vec4(positions[gl_VertexID], 0.0, 1.0);
v_uv = positions[gl_VertexID];
}
''',
fragment_shader='''
#version 330
in vec2 v_uv;
out vec4 f_color;
uniform sampler2D Texture;
uniform vec2 seed;
uniform int iter;
void main() {
vec2 c = seed;
int i;
vec2 z = v_uv * vec2(2.0, 2.0);
for (i = 0; i < iter; i++) {
float x = (z.x * z.x - z.y * z.y) + c.x;
float y = (z.y * z.x + z.x * z.y) + c.y;
if ((x * x + y * y) > 4.0) {
break;
}
z.x = x;
z.y = y;
}
f_color = texture(Texture, vec2((i == iter ? 0.0 : float(i)) / 100.0, 0.0));
}
''',
)
self.texture = self.load_texture_2d('colormaps/fractal.png')
self.sampler = self.ctx.sampler(texture=self.texture)
self.vao = self.ctx.vertex_array(self.program, [])
self.vao.vertices = 3
def render(self, time, frame_time):
self.ctx.clear()
self.program['seed'] = (-0.8, 0.156)
self.program['iter'] = 100
self.sampler.use()
self.vao.render()
if __name__ == '__main__':
Example.run()
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