132 lines
3.5 KiB
C
132 lines
3.5 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 ortho_in;
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double ortho_out;
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} Variables;
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#define _USE_MATH_DEFINES
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#include "apoplugin.h"
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// Set the name of this plugin
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APO_PLUGIN("ortho");
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// Define the Variables
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APO_VARIABLES(
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VAR_REAL_CYCLE(ortho_in, -M_PI, M_PI, 0.0),
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VAR_REAL_CYCLE(ortho_out, -M_PI, M_PI, 0.0)
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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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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 r, a;
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double xo;
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double ro;
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double c,s;
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double x,y, tc, ts;
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double theta;
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r = sqr(FTx) + sqr(FTy);
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if ( r < 1.0)// && FTx > 0.0 && FTy > 0.0)
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{
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if(FTx >= 0.0)
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{
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xo = (r + 1.0)/ (2.0 * FTx);
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ro = sqrt(sqr(FTx - xo) + sqr(FTy));
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theta = atan2(1.0 , ro);
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a = fmod( VAR(ortho_in)* theta + atan2(FTy, xo - FTx ) + theta, 2.0 * theta) - theta;
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fsincos(a, &s, &c);
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FPx += VVAR * (xo - c * ro);
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FPy += VVAR * s * ro;
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}
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else
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{
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xo = - (r + 1.0)/ (2.0 * FTx);
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ro = sqrt(sqr(-FTx - xo) + sqr(FTy));
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theta = atan2(1.0 , ro);
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a = fmod( VAR(ortho_in) * theta + atan2(FTy, xo + FTx ) + theta, 2.0 * theta) - theta;
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fsincos(a, &s, &c);
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FPx -= VVAR * (xo - c * ro);
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FPy += VVAR * s * ro;
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}
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}
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else
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{
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r = 1.0 / sqrt(r);
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fsincos( atan2(FTy, FTx), &ts, &tc);
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x = r * tc;
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y = r * ts;
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if(x >= 0.0)
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{
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xo = (sqr(x) + sqr(y) + 1.0)/ (2.0 * x);
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ro = sqrt(sqr(x - xo) + sqr(y));
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theta = atan2(1.0 , ro);
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a = fmod( VAR(ortho_out)* theta + atan2(y, xo - x ) + theta, 2.0 * theta) - theta;
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fsincos(a, &s, &c);
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x = (xo - c * ro);
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y = s * ro;
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fsincos( atan2(y, x), &ts, &tc);
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r = 1.0 / sqrt(sqr(x) + sqr(y));
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FPx += VVAR * r * tc;
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FPy += VVAR * r * ts;
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}
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else
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{
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xo = - (sqr(x) + sqr(y) + 1.0)/ (2.0 * x);
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ro = sqrt(sqr(-x - xo) + sqr(y));
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theta = atan2(1.0 , ro);
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a = fmod( VAR(ortho_out) * theta + atan2(y, xo + x ) + theta, 2.0 * theta) - theta;
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fsincos(a, &s, &c);
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x = (xo - c * ro);
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y = s * ro;
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fsincos( atan2(y, x), &ts, &tc);
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r = 1.0 / sqrt(sqr(x) + sqr(y));
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FPx -= VVAR * r * tc;
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FPy += VVAR * r * ts;
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}
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}
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return TRUE;
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}
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