#version 450
#extension GL_ARB_separate_shader_objects : enable

layout(location = 0) in vec4 position;
layout(location = 1) in vec4 normal;
layout(location = 2) in vec4 color;
layout(location = 3) in float weight;
layout(location = 0) out vec4 outColor;

layout(binding = 0) uniform NodeData
{
	mat4 world;
} node;

layout(std140, push_constant) uniform CameraData
{
	mat4 viewProjection;
	mat4 view;
	mat4 projection;
	vec4 camPos;
} cam;

void main()
{
	//vec4 worldPos = node.world * position;
	vec4 worldPos = node.world[3] + position;
	worldPos.w = 1;

	//float discardHelper = 0;
	float discardHelper = normal.a * 3;
	vec3 camDir = (worldPos - cam.camPos).xyz;
	// normal culling
	if (dot(normal.xyz, camDir) > 0)
	{
		discardHelper += 3;
	}

	outColor = color;
	//outColor = normal / 2 + 0.5f;
	//outColor = vec4(weight/10, weight / 50, weight / 100, 1);
	//gl_Position = normalize(cam.viewProjection * worldPos);
	gl_Position = cam.viewProjection * worldPos;
	gl_PointSize = max(1, 4 - dot(camDir, camDir) / 2);

	gl_Position.z += discardHelper;
}