49 lines
1.6 KiB
GLSL
49 lines
1.6 KiB
GLSL
#version 100
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precision highp float;
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// Matrices
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uniform mat4 u_projection;
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uniform mat4 u_model_view;
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uniform mat4 u_texture;
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// Texture
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attribute vec3 a_vertex_coords;
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attribute vec2 a_texture_coords;
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varying vec4 v_texture_pos;
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// Color
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attribute vec4 a_color;
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varying vec4 v_color;
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// Normal
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attribute vec3 a_normal;
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uniform float u_normal_rescale_factor;
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// Lighting
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uniform bool u_lighting;
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uniform vec4 u_lighting_ambient;
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uniform bool u_lighting_light_source_0;
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uniform vec3 u_lighting_light_source_0_position;
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uniform vec4 u_lighting_light_source_0_diffuse;
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uniform bool u_lighting_light_source_1;
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uniform vec3 u_lighting_light_source_1_position;
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uniform vec4 u_lighting_light_source_1_diffuse;
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// Fog
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varying vec4 v_fog_eye_position;
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// Main
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void main(void) {
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v_texture_pos = u_texture * vec4(a_texture_coords.xy, 0.0, 1.0);
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gl_Position = u_projection * u_model_view * vec4(a_vertex_coords.xyz, 1.0);
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v_color = a_color;
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v_fog_eye_position = u_model_view * vec4(a_vertex_coords.xyz, 1.0);
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// Lighting
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if (u_lighting) {
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vec4 transformed_normal = u_model_view * vec4(a_normal, 0.0) * u_normal_rescale_factor;
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vec4 total_light = u_lighting_ambient;
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if (u_lighting_light_source_0) {
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total_light += max(0.0, dot(transformed_normal.xyz, u_lighting_light_source_0_position)) * u_lighting_light_source_0_diffuse;
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}
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if (u_lighting_light_source_1) {
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total_light += max(0.0, dot(transformed_normal.xyz, u_lighting_light_source_1_position)) * u_lighting_light_source_1_diffuse;
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}
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total_light = clamp(total_light, 0.0, 1.0);
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v_color *= total_light;
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}
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}
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