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https://bitbucket.org/CPMADevs/cnq3
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61 lines
1.5 KiB
HLSL
61 lines
1.5 KiB
HLSL
/*
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===========================================================================
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Copyright (C) 2023-2024 Gian 'myT' Schellenbaum
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This file is part of Challenge Quake 3 (CNQ3).
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Challenge Quake 3 is free software; you can redistribute it
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and/or modify it under the terms of the GNU General Public License as
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published by the Free Software Foundation; either version 2 of the License,
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or (at your option) any later version.
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Challenge Quake 3 is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with Challenge Quake 3. If not, see <https://www.gnu.org/licenses/>.
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===========================================================================
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*/
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// gather depth of field: support functions
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#pragma once
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#include "common.hlsli"
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#define MAX_BLUR_DIAMETER 32.0
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#define MAX_COC 16.0
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float CircleOfConfusion(float depth, float focusNearMin, float focusNearMax, float focusFarMin, float focusFarMax)
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{
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if(depth <= focusNearMin)
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{
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return -1.0;
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}
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if(depth > focusNearMin && depth < focusNearMax)
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{
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float t = 1.0 - (depth - focusNearMin) / (focusNearMax - focusNearMin);
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return -t;
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}
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if(depth > focusFarMin && depth < focusFarMax)
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{
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float t = (depth - focusFarMin) / (focusFarMax - focusFarMin);
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return t;
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}
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if(depth >= focusFarMax)
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{
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return 1.0;
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}
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return 0.0;
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}
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