vertex.glsl

#version 330 core

layout (location = 0) in vec3 position;
layout (location = 1) in vec3 normal;
layout (location = 2) in vec2 texCoord;

layout (location = 3) in vec3 partCoord;
layout (location = 4) in vec4 partPosition;
layout (location = 5) in vec4 partColor;

uniform mat4 model;
uniform mat4 view;
uniform mat4 projection;
uniform mat4 normalModel;

uniform int objectType;

out vec3 Normal;
out vec3 FragPos;
out vec2 TexCoord;
out vec4 PartColor;

const int PARTICLE     = 3;
const int BOUNDINGBOX  = 4;

void main()
{
    switch (objectType) {
    case PARTICLE:
        vec4 ppos = vec4(partCoord, 1.0) + partPosition;
        gl_Position = projection * view * ppos;

        PartColor = partColor;
        TexCoord = texCoord;
        break;

    case BOUNDINGBOX:
        gl_Position = projection * view * vec4(position, 1.0);
        break;

    default:
        gl_Position = projection * view * model * vec4(position, 1.0);

        Normal = mat3(normalModel)*normal;

        FragPos = vec3(model * vec4(position, 1.0));
        TexCoord = texCoord;

        break;
    }
}