comaps/libs/shaders/GL/masked_texturing_billboard.vsh.glsl

in vec4 a_position;
in vec2 a_normal;
in vec2 a_colorTexCoords;
in vec2 a_maskTexCoords;

uniform mat4 u_modelView;
uniform mat4 u_projection;
uniform mat4 u_pivotTransform;
uniform float u_zScale;

out vec2 v_colorTexCoords;
out vec2 v_maskTexCoords;

void main()
{
  vec4 pivot = vec4(a_position.xyz, 1.0) * u_modelView;
  vec4 offset = vec4(a_normal, 0.0, 0.0) * u_projection;
  gl_Position = applyBillboardPivotTransform(pivot * u_projection, u_pivotTransform,
                                             a_position.w * u_zScale, offset.xy);
  v_colorTexCoords = a_colorTexCoords;
  v_maskTexCoords = a_maskTexCoords;
}