102 lines
2.7 KiB
C
102 lines
2.7 KiB
C
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/*
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Apophysis Plugin
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program 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 this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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// Must define this structure before we include apoplugin.h
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typedef struct
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{
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double checks_x;
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double checks_y;
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double checks_size;
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double checks_rnd;
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double cs, cx, cy, ncx, ncy;
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} Variables;
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#include "apoplugin.h"
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// Set the name of this plugin
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APO_PLUGIN("checks");
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// Define the Variables
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APO_VARIABLES(
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VAR_REAL(checks_x, 0.5),
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VAR_REAL(checks_y, 0.5),
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VAR_REAL(checks_size, 0.5),
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VAR_REAL(checks_rnd, 0.0)
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);
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inline double lrint(double x)
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{
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long int temp; temp = (x >= 0. ? (long int)(x + 0.5) : (long int)(x - 0.5));
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return (double)temp;
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}
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// You must call the argument "vp".
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int PluginVarPrepare(Variation* vp)
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{
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// Multiplication is faster than division, so divide in precalc, multiply in calc.
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VAR(cs) = 1.0 / (VAR(checks_size) + EPS);
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// -X- Copied the variables as we only need them for reading
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// This is just for safety :-)
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VAR(cx) = VAR(checks_x); VAR(cy) = VAR(checks_y);
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// -X- Then precalculate -checkx_x, -checks_y
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VAR(ncx) = VAR(checks_x) * -1.0; VAR(ncy) = VAR(checks_y) * -1.0;
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return TRUE; // Always return TRUE.
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}
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// You must call the argument "vp".
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int PluginVarCalc(Variation* vp)
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{
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double dx, dy;
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double x = FTx * VAR(cs);
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double y = FTy * VAR(cs);
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int isXY = lrint(FTx * VAR(cs)) +
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lrint(FTy * VAR(cs));
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// -X- This is just for code readability,
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// if there is any impact on performance, its minimal :-)
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double rnx = VAR(checks_rnd) * random01();
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double rny = VAR(checks_rnd) * random01();
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if (isXY % 2)
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{
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// -X- The -VAR(checks_#) stuff caused the error!
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dx = VAR(ncx) + rnx;
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dy = VAR(ncy);
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}
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else
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{
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dx = VAR(cx);
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dy = VAR(cy) + rny;
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}
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FPx += VVAR * (FTx + dx);
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FPy += VVAR * (FTy + dy);
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// -X- and as a little goodie, I pass through FTz so that
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// neat lil variation does not kill 3Dness in hack & 7X
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FPz += VVAR * (FTz);
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return TRUE;
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}
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