OpenSpace/modules/globebrowsing/shaders/globalchunkedlodpatch_fs.glsl

/*****************************************************************************************
 *                                                                                       *
 * OpenSpace                                                                             *
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 * Copyright (c) 2014                                                                    *
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// Colortexture coverage
uniform sampler2D textureSamplerColor;
uniform vec2 colorSamplingScale;
uniform vec2 colorSamplingOffset;

in vec4 vs_position;
in vec3 fs_position;
in vec2 fs_uv;

#include "PowerScaling/powerScaling_fs.hglsl"
#include "fragment.glsl"

vec4 borderOverlay(vec2 uv, vec3 borderColor, float borderSize){

	vec2 uvOffset = uv - vec2(0.5);
	float thres = 0.5 - borderSize/2;
	bool isBorder = abs(uvOffset.x) > thres || abs(uvOffset.y) > thres;
	vec3 color = isBorder ? borderColor : vec3(0);
	return vec4(color, 0);
}



Fragment getFragment() {
	Fragment frag;

	vec2 samplePos = colorSamplingScale*fs_uv + colorSamplingOffset;
	frag.color = texture(textureSamplerColor, samplePos);

	// Sample position overlay
	//frag.color = frag.color * 0.9 + 0.2*vec4(samplePos, 0, 1);

	// Border overlay
	//frag.color = frag.color + borderOverlay(fs_uv, vec3(0.5, 0.5, 0.5), 0.02);

	frag.depth = vs_position.w;

	return frag;
}