layout (location=0) in vec3 a_co;
layout (location=1) in vec3 a_norm;
layout (location=2) in vec4 a_colour;
layout (location=3) in vec2 a_uv;

#line      2        0 

uniform mat4 uPv;
uniform mat4x3 uMdl;
uniform float uOpacity;

out vec4 aColour;
out vec2 aUv;
out vec3 aNorm;
out vec3 aCo;
out float aOpacity;

void main()
{
   vec3 world_pos = uMdl * vec4(a_co,1.0);
   gl_Position = uPv * vec4(world_pos,1.0);

   aColour = a_colour;
   aUv = a_uv;
   aNorm = mat3(uMdl) * a_norm;
   aCo = a_co;
   aOpacity = 1.0-(gl_Position.y+0.5)*uOpacity;
}