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in vec4 vertPosition;
in mat4 vertModelMatrix;
flat out mat4 invModelMatrix;
flat out vec3 decalDirection;
flat out float normal_angle_cutoff;
flat out float angle_fade_start;
flat out float alpha_scale;
layout (std140) uniform decalGlobalData {
mat4 viewMatrix;
mat4 projMatrix;
mat4 invViewMatrix;
mat4 invProjMatrix;
vec2 viewportSize;
};
layout (std140) uniform decalInfoData {
int diffuse_index;
int glow_index;
int normal_index;
int diffuse_blend_mode;
int glow_blend_mode;
};
void main() {
normal_angle_cutoff = vertModelMatrix[0][3];
angle_fade_start = vertModelMatrix[1][3];
alpha_scale = vertModelMatrix[2][3];
mat4 modelMatrix = vertModelMatrix;
modelMatrix[0][3] = 0.0;
modelMatrix[1][3] = 0.0;
modelMatrix[2][3] = 0.0;
invModelMatrix = inverse(modelMatrix);
decalDirection = mat3(viewMatrix) * modelMatrix[2].xyz;
gl_Position = projMatrix * viewMatrix * modelMatrix * vertPosition;
}
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