#version 150

in vec3 position;
in vec2 texCoord;
in vec3 normal;
in vec4 color;

uniform mat4 projectionTransform;
uniform mat4 viewTransform;
uniform mat4 modelTransform;
uniform mat3 normalMatrix;
uniform vec4 frontColor;
uniform vec4 backColor;

out vec3 vertPosition;
out vec2 vertTexCoord;
out vec3 vertNormal;
out vec4 vertColor;

void main() {
	vec4 modelPosition = modelTransform * vec4(position, 1.0);
	vertPosition = vec3(modelPosition);
	vertColor = backColor + vec4(color.r * color.a, color.g * color.a, color.b * color.a, color.a) * frontColor * (vec4(1.0, 1.0, 1.0, 1.0) - backColor);
	vertTexCoord = texCoord;
	vertNormal = normalMatrix * normal;
	gl_Position = projectionTransform * viewTransform * modelPosition;
}