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- ;
- ; Command & Conquer Generals(tm)
- ; Copyright 2025 Electronic Arts Inc.
- ;
- ; This program is free software: you can redistribute it and/or modify
- ; it under the terms of the GNU General Public License as published by
- ; the Free Software Foundation, either version 3 of the License, or
- ; (at your option) any later version.
- ;
- ; This program is distributed in the hope that it will be useful,
- ; but WITHOUT ANY WARRANTY; without even the implied warranty of
- ; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- ; GNU General Public License for more details.
- ;
- ; You should have received a copy of the GNU General Public License
- ; along with this program. If not, see <http://www.gnu.org/licenses/>.
- ;
- ;////////////////////////////////////////////////////////////////////////////////
- ;// //
- ;// (c) 2001-2003 Electronic Arts Inc. //
- ;// //
- ;////////////////////////////////////////////////////////////////////////////////
- ; Terrain pixel shader
- ; Created: Mark Wilczynski, August 2001
- ; Declare pixel shader version 1.1
- ps.1.1
- tex t0 ; get texture 0
- ;dp3 r1, c1, t0
- ;add r0,r1,-c2
- ;mul r0,r0,c3
- ;mov r0,t0 ;do nothing
- //Inverted image
- ;dp3 r1, t0, c0 ;black & white conversion
- ;mul r0, 1-r1, c1 ;modulate inverted by filter color
- ;lrp r0, c2, r0, t0 ;blend modified image into original image so smooth fade in/out
- //Red inverted image
- dp3 r1, t0, c0 ;black & white conversion
- mul r1, r1, c1 ;modulate by filter color (inverse of red)
- lrp r0, c2, 1-r1, t0 ;blend modified image into original image so smooth fade in/out
- ;Code to clamp and expand dynamic range
- ;add_sat r1,r1,-c7 ;clamp out low values - 30
- ;add_sat r1,r1,c5 ;clamp out upper values +60
- ;add r1,r1,-c6 ;shift to center range at 0
- ;add r0,r0,-c5
- ;mul_x4 r0,r0,c6
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