96 lines
2.3 KiB
GLSL
96 lines
2.3 KiB
GLSL
#pragma STAGE: VERTEX
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#pragma GEOMETRY: POINT_CLOUD
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#pragma FEATURES: SQUARE V_L V_RGB V_A LIGHTING U_RGBA RAINBOW
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#pragma FEATURE_TOGGLES: V_L V_RGB V_A LIGHTING U_RGBA RAINBOW
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#ifdef V_L
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#ifdef V_RGB
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#error Vertex luminance and vertex RGB are mutually exclusive
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#endif
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#endif
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//------------[ Uniforms ]------------//
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layout (location = 0) uniform mat4 mvp_matrix;
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layout (location = 1) uniform float point_size;
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#ifdef U_RGBA
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layout (location = 2) uniform vec4 color;
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#endif
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#ifdef LIGHTING
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layout (location = 3) uniform mat4 model_matrix;
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layout (location = 4) uniform vec3 camera_position;
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#endif
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#ifdef RAINBOW
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layout (location = 5) uniform float rainbow_offset_y;
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layout (location = 6) uniform float rainbow_scale_y;
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#endif
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//------------[ Inputs ]------------//
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layout (location = 0) in vec3 model_vertex_position;
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#ifdef LIGHTING
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layout (location = 1) in vec3 model_vertex_normal;
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#endif
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#ifdef V_L
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layout (location = 2) in float model_vertex_l;
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#endif
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#ifdef V_RGB
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layout (location = 2) in vec3 model_vertex_rgb;
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#endif
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#ifdef V_A
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layout (location = 3) in float model_vertex_a;
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#endif
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//------------[ Outputs ]------------//
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layout (location = 0) out vec4 clip_vertex_color;
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#ifdef RAINBOW
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// taken from 'https://github.com/hughsk/glsl-hsv2rgb'
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vec3 hue2rgb(float hue)
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{
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vec4 offsets = vec4(1.0, 2.0 / 3.0, 1.0 / 3.0, 3.0);
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vec3 p = abs(fract(vec3(hue) + offsets.xyz) * 6.0 - offsets.www);
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return clamp(p - offsets.xxx, 0.0, 1.0);
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}
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#endif
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void main()
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{
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gl_Position = mvp_matrix * vec4(model_vertex_position, 1.0);
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gl_PointSize = point_size / gl_Position.w;
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clip_vertex_color = vec4(1);
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#ifdef V_L
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clip_vertex_color.rgb *= model_vertex_l;
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#endif
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#ifdef V_RGB
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clip_vertex_color.rgb *= model_vertex_rgb;
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#endif
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#ifdef V_A
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clip_vertex_color.a *= model_vertex_a;
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#endif
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#ifdef U_RGBA
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clip_vertex_color *= color;
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#endif
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#ifdef LIGHTING
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vec3 world_position = vec3(model_matrix * vec4(model_vertex_position, 1.0));
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vec3 world_normal = normalize(mat3(model_matrix) * model_vertex_normal);
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vec3 view_direction = normalize(camera_position - world_position);
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clip_vertex_color.rgb *= max(dot(world_normal, view_direction), 0.0);
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#endif
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#ifdef RAINBOW
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float rainbow_pos = rainbow_scale_y * (model_vertex_position.y + rainbow_offset_y);
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clip_vertex_color.rgb *= hue2rgb(mod(rainbow_pos, 1.0f));
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#endif
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}
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