OpenSpace/shaders/pscstandard_fs.glsl

/*****************************************************************************************
 *                                                                                       *
 * OpenSpace                                                                             *
 *                                                                                       *
 * Copyright (c) 2014                                                                    *
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 * Permission is hereby granted, free of charge, to any person obtaining a copy of this  *
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 * The above copyright notice and this permission notice shall be included in all copies *
 * or substantial portions of the Software.                                              *
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 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,   *
 * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A         *
 * PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT    *
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 ****************************************************************************************/

#version __CONTEXT__

uniform vec4 campos;
uniform vec4 objpos;
//uniform vec3 camdir; // add this for specular


uniform float time;
uniform sampler2D texture1;

in vec2 vs_st;
in vec4 vs_normal;
in vec4 vs_position;

#include "ABuffer/abufferStruct.hglsl"
#include "ABuffer/abufferAddToBuffer.hglsl"
#include "PowerScaling/powerScaling_fs.hglsl"

//#include "PowerScaling/powerScaling_vs.hglsl"
void main()
{
	vec4 position = vs_position;
	float depth = pscDepth(position);
	vec4 diffuse = texture(texture1, vs_st);
	
	// directional lighting
	vec3 origin = vec3(0.0);
	vec4 spec = vec4(0.0);
	
	vec3 n = normalize(vs_normal.xyz);
	//vec3 e = normalize(camdir);
	vec3 l_pos = vec3(0.0); // sun.
	vec3 l_dir = normalize(l_pos-objpos.xyz);
	float intensity = min(max(5*dot(n,l_dir), 0.0), 1);
	
	float shine = 0.0001;

	vec4 specular = vec4(0.5);
	vec4 ambient = vec4(0.0,0.0,0.0,1);
	/*
	if(intensity > 0.f){
		// halfway vector
		vec3 h = normalize(l_dir + e);
		// specular factor
		float intSpec = max(dot(h,n),0.0);
		spec = specular * pow(intSpec, shine);
	}
	*/
	diffuse = max(intensity * diffuse, ambient);
	//diffuse = vec4(1);

	ABufferStruct_t frag = createGeometryFragment(diffuse, position, depth);
	addToBuffer(frag);
}