#version 430

//bones
uniform mat4 ProjectionMatrix;
uniform mat4 CameraMatrix;
uniform mat4 ModelMatrix;

uniform mat4 Bones[64];

layout(location = 0) in vec3 vertex;
//layout(location = 1) in vec2 uv;
//layout(location = 2) in vec3 normal;
layout(location = 3) in ivec4 boneIndices;
layout(location = 4) in vec4 vertexWeights;

const int NUM_INFLUENCE_BONES = 4;

void main()
{
    vec4 final = vec4(0);

    if(vertexWeights[0] + vertexWeights[1] + vertexWeights[2] + vertexWeights[3] > 0.9)
        for(int i = 0; i < NUM_INFLUENCE_BONES; i++)
        {
            vec4 v = Bones[boneIndices[i]] * vec4(vertex, 1.0) * vertexWeights[i];

            final += v;
        }
    else
        final = vec4(vertex,1.0);

    gl_Position = ProjectionMatrix * CameraMatrix * ModelMatrix * final;
}