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/**
* @author javdevgames http://coding.javdev.com
*
* DepthBufferTests
* The MIT License (MIT)
* Copyright (c) 2015 javdevgames
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
* 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 HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*
*/
use namespace flare;
use namespace flare.transforms;
use namespace flare.blendMode;
param sampler2D depthTexture;
param float4 tint = float4(0.039,0.18,0.45,0.4);
technique main
{
float4 pos = transform();
output vertex = pos;
float3 ndc = pos.xyz / pos.w;
interpolated float viewPortCoordX = ndc.x * 0.5 + 0.5;
interpolated float viewPortCoordY = (1-ndc.y) * 0.5 + 1;
interpolated float iPos = pos.w / 300.0;
float diff = sampler2D(depthTexture, float2(viewPortCoordX,viewPortCoordY)).r - iPos;
float4 intersect = 0;
float originalDiff = diff;
kill(diff);
diff *= 4;
intersect = 1-smoothstep(0, 0.1, diff);
intersect *= ceil(diff);
float4 col = tint * tint.a + intersect;
output sourceFactor = "one";
output destFactor = "one";
output cullFace = "none";
output depthWrite = false;
output fragment = col;
}