#version 450 core

layout (location = 0) in vec3 position;
layout (location = 1) in vec2 texCoord;
layout (location = 2) in ivec4 jointIndices;
layout (location = 3) in vec4 jointWeights;

out vec3 textureCoord;

uniform mat4 theModelMatrix;
uniform mat4 theViewMatrix;
uniform mat4 theProjMatrix;
uniform mat4 theJointMatrices[64];
uniform float texIndex;

void main()
{
	mat4 skinMatrix =
		jointWeights.x * theJointMatrices[jointIndices.x] +
		jointWeights.y * theJointMatrices[jointIndices.y] +
		jointWeights.z * theJointMatrices[jointIndices.z] +
		jointWeights.w * theJointMatrices[jointIndices.w];
	
	vec4 localPos = skinMatrix * vec4(position, 1.0);
	mat4 mvp = theProjMatrix * theViewMatrix * theModelMatrix;
	
	gl_Position = mvp * localPos;
	textureCoord = vec3(texCoord.x, texCoord.y, texIndex);
}