urho3d/SourceAssets/GLSLShaders/LitParticle.vert

#include "Uniforms.vert"
#include "Transform.vert"

varying vec2 vTexCoord;
#ifdef VERTEXCOLOR
    varying vec4 vColor;
#endif
varying vec4 vLightVec;
#ifdef SPOTLIGHT
    varying vec4 vSpotPos;
#endif
#ifdef POINTLIGHT
    varying vec3 vCubeMaskVec;
#endif

void main()
{
    mat4 modelMatrix = iModelMatrix;
    vec3 worldPos = GetWorldPos(modelMatrix);
    gl_Position = GetClipPos(worldPos);
    vTexCoord = GetTexCoord(iTexCoord);

    #ifdef VERTEXCOLOR
        vColor = iColor;
    #endif

    vec4 projWorldPos = vec4(worldPos, 1.0);

    #ifdef DIRLIGHT
        vLightVec = vec4(cLightDir, GetDepth(gl_Position));
    #else
        vLightVec = vec4((cLightPos.xyz - worldPos) * cLightPos.w, GetDepth(gl_Position));
    #endif

    #ifdef SPOTLIGHT
        // Spotlight projection: transform from world space to projector texture coordinates
        vSpotPos = cLightMatrices[0] * projWorldPos;
    #endif

    #ifdef POINTLIGHT
        vCubeMaskVec = mat3(cLightMatrices[0][0].xyz, cLightMatrices[0][1].xyz, cLightMatrices[0][2].xyz) * vLightVec.xyz;
    #endif
}