52 lines
2.0 KiB
Forth
52 lines
2.0 KiB
Forth
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#version 140
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const vec3 ZERO = vec3(0.0, 0.0, 0.0);
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const vec3 WHITE = vec3(1.0, 1.0, 1.0);
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const float ONE_OVER_EPSILON = 1e4;
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struct PrintVolumeDetection
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{
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// 0 = rectangle, 1 = circle, 2 = custom, 3 = invalid
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int type;
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// type = 0 (rectangle):
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// x = min.x, y = min.y, z = max.x, w = max.y
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// type = 1 (circle):
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// x = center.x, y = center.y, z = radius
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vec4 xy_data;
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// x = min z, y = max z
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vec2 z_data;
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};
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uniform vec4 uniform_color;
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uniform float emission_factor;
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uniform PrintVolumeDetection print_volume;
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// x = diffuse, y = specular;
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in vec2 intensity;
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in vec4 world_pos;
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out vec4 frag_color;
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void main()
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{
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vec3 color = uniform_color.rgb;
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float alpha = uniform_color.a;
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// if the fragment is outside the print volume -> use darker color
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vec3 pv_check_min = ZERO;
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vec3 pv_check_max = ZERO;
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if (print_volume.type == 0) {// rectangle
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pv_check_min = world_pos.xyz - vec3(print_volume.xy_data.x, print_volume.xy_data.y, print_volume.z_data.x);
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pv_check_max = world_pos.xyz - vec3(print_volume.xy_data.z, print_volume.xy_data.w, print_volume.z_data.y);
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pv_check_min = pv_check_min * ONE_OVER_EPSILON;
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pv_check_max = pv_check_max * ONE_OVER_EPSILON;
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color = (any(lessThan(pv_check_min, vec3(1.0))) || any(greaterThan(pv_check_max, vec3(1.0)))) ? mix(color, WHITE, 0.3333) : color;
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}
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else if (print_volume.type == 1) {// circle
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float delta_radius = print_volume.xy_data.z - distance(world_pos.xy, print_volume.xy_data.xy);
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pv_check_min = vec3(delta_radius, 0.0, world_pos.z - print_volume.z_data.x);
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pv_check_max = vec3(0.0, 0.0, world_pos.z - print_volume.z_data.y);
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pv_check_min = pv_check_min * ONE_OVER_EPSILON;
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pv_check_max = pv_check_max * ONE_OVER_EPSILON;
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color = (any(lessThan(pv_check_min, vec3(1.0))) || any(greaterThan(pv_check_max, vec3(1.0)))) ? mix(color, WHITE, 0.3333) : color;
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}
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frag_color = vec4(vec3(intensity.y) + color * (intensity.x + emission_factor), alpha);
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}
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