64 lines
1.9 KiB
GLSL
64 lines
1.9 KiB
GLSL
#version 120
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attribute vec3 a_position;
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attribute vec3 a_normal;
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attribute vec2 a_texcoord;
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attribute vec4 a_boneIds;
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attribute vec4 a_weights;
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varying vec3 v_position;
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varying vec3 v_normal;
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varying vec2 v_texcoord;
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varying vec3 v_finalColor;
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uniform mat4 u_modelMatrix;
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uniform mat4 u_viewMatrix;
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uniform mat4 u_projectionMatrix;
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uniform mat4 u_modelViewProjection;
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uniform vec4 u_sunDirection;
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uniform vec4 u_sunColor;
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uniform vec4 u_sunAmbientColor;
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uniform vec4 u_cameraPos;
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uniform mat4 u_boneMatrices[128];
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// #TODO: should use own uniforms
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#define u_ligthPosition u_sunDirection.xyz
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#define u_ligthRadius u_sunDirection.w
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// Calculate blinn-phong per-vertex lighting
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vec3 CalcPhongLighting( vec3 worldPos, vec3 normal, vec3 lightPos ) {
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vec3 lightDir = normalize( lightPos - worldPos );
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vec3 viewDir = normalize( u_cameraPos.xyz - worldPos );
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vec3 halfVec = normalize( lightDir + viewDir );
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float diff = max( dot( normal, lightDir ), 0.0 );
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float spec = pow( max( dot( normal, halfVec ), 0.0 ), 32.0 );
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float lightlength = length( lightPos - worldPos );
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float attenuation = max( 0.0, 1.0 - lightlength / u_ligthRadius );
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diff = diff * attenuation;
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spec = spec * attenuation;
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return u_sunAmbientColor.rgb + (u_sunColor.rgb * diff) + (u_sunColor.rgb * spec);
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}
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void main() {
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// calculate bone transform
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mat4 skinMatrix = a_weights.x * u_boneMatrices[ int( a_boneIds.x ) ]
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+ a_weights.y * u_boneMatrices[ int( a_boneIds.y ) ]
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+ a_weights.z * u_boneMatrices[ int( a_boneIds.z ) ]
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+ a_weights.w * u_boneMatrices[ int( a_boneIds.w ) ];
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// Position
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v_position = vec3( skinMatrix * vec4( a_position, 1.0 ) );
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v_position = vec3( u_modelMatrix * vec4( v_position, 1.0 ) );
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v_normal = vec3( mat3(u_modelMatrix) * a_normal );
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v_normal = normalize(v_normal);
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v_texcoord = a_texcoord;
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v_finalColor = CalcPhongLighting( v_position, v_normal, u_ligthPosition );
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gl_Position = u_projectionMatrix * u_viewMatrix * vec4( v_position, 1.0 );
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} |