next_tworect.fp

来自「PDE simulator on GPU.」· FP 代码 · 共 34 行

!!FP1.0
#THIS PROGRAM MOVE TWO TEXELS
DECLARE OneTexOffset ={0, 0, 0, 0};

#Condition Test
MOV R1, f[TEX1];

#move one texel condition
MOV R6, {1, 0, 0, 0};
SUB R6, R6, OneTexOffset.xwww;

#move one texel condition
SGE R4, R1.xxxx, R6.xxxx;

#move two texels condition
SUB R6, R6, OneTexOffset.xwww;
SGE R5, R1.xxxx, R6.xxxx;

#move one texel to left
SLT R6.x, R4.x, {1};
MUL R2.x, R6.x, OneTexOffset.x;
ADD R2.y, R1.y, OneTexOffset.y;

#move two texels to left
ADD R3.x, R1.x, OneTexOffset.x;
ADD R3.x, R3.x, OneTexOffset.x;
MOV R3.y, R1.y;

LRP R6, R5, R3, R2;

TEX R0, R6, TEX1, 2D;

MOV o[COLR], R0;
END