65 lines
2.0 KiB
GLSL
65 lines
2.0 KiB
GLSL
#version 150 core
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uniform vec4 uColor;
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uniform vec3 uLightDirection;
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uniform vec3 uViewPosition;
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uniform sampler2D uAlbedoTexture;
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uniform sampler2D uShadowMap;
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in vec3 ioFragPosition;
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in vec3 ioFragNormal;
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in vec2 ioFragTexCoords;
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smooth in vec4 ioFragColor;
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in vec4 ioFragPosLightSpace;
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out vec4 outColor;
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float ShadowCalculation(vec4 frag_pos_light_space) {
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vec3 projected_coordinates = frag_pos_light_space.xyz / frag_pos_light_space.w;
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projected_coordinates = projected_coordinates * 0.5 + 0.5;
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float closest_depth = texture(uShadowMap, projected_coordinates.xy).r;
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float current_depth = projected_coordinates.z;
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float bias = max(0.05 * (1.0 - dot(ioFragNormal, uLightDirection)), 0.005);
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bias = 0.0;
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return current_depth - bias > closest_depth ? 1.0 : 0.0;
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}
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void main() {
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vec4 albedo_color = texture(uAlbedoTexture, ioFragTexCoords) * ioFragColor * uColor;
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// ambient lighting
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float ambient_strength = 0.2;
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vec4 ambient = ambient_strength * albedo_color;
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// diffuse lighting
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vec3 normal_dir = normalize(ioFragNormal);
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vec3 light_dir = normalize(uLightDirection);
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float diff = max(dot(normal_dir, light_dir), 0.0);
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vec4 diffuse = diff * albedo_color;
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// specular lighting
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vec3 view_dir = normalize(uViewPosition - ioFragPosition);
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vec3 halfway_dir = normalize(light_dir + view_dir);
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float spec = pow(max(dot(normal_dir, halfway_dir), 0.0), 32);
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vec4 specular = spec * vec4(0.5);
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// shadow
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float shadow = ShadowCalculation(ioFragPosLightSpace);
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outColor = ambient + (1.0 - shadow) * (diffuse + specular);
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//
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//
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// vec3 projected_coordinates = ioFragPosLightSpace.xyz / ioFragPosLightSpace.w;
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// projected_coordinates = projected_coordinates * 0.5 + 0.5;
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// float shadow_map_value = texture(uShadowMap, projected_coordinates.xy).r;
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// outColor = shadow_map_value * vec4(1.0, 1.0, 1.0, 1.0);
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//
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// outColor = vec4(vec3(1.0f - shadow_map_value), 1.0);
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// outColor = (shadow) * vec4(1.0, 1.0, 1.0, 1.0);
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// outColor = ioFragPosLightSpace / ioFragPosLightSpace.w;
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// outColor = ambient + diffuse + specular;
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}
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