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/*
* src/drawStone.c, part of Complete Goban (game program)
* Copyright (C) 1995-1996 William Shubert.
* See "configure.h.in" for more copyright information.
*
* This code extends the wmslib/but library to add special buttons needed
* for cgoban.
*
* The globe data was extracted from the CIA World Data Bank II map database.
*
*/
#include <math.h>
#include <wms.h>
#include <but/but.h>
#include <but/net.h>
#include <wms/rnd.h>
#include <wms/str.h>
#include "goBoard.h"
#ifdef _DRAWSTONE_H_
Levelization Error.
#endif
#include "drawStone.h"
/**********************************************************************
* Data Types
**********************************************************************/
typedef struct WhiteDesc_struct {
float cosTheta, sinTheta;
float stripeWidth, xAdd;
float stripeMul, zMul;
} WhiteDesc;
/**********************************************************************
* Forward Declarations
**********************************************************************/
static void decideAppearance(WhiteDesc *desc, int size, Rnd *rnd);
static float calcCosAngleReflection2View(int x, int y, int r,
float *lambertian, float *z);
static void drawNngs(Display *dpy, GC gc, Pixmap pic, int xOff, int size);
static void drawIgs(Display *dpy, GC gc, Pixmap pic, int xOff, int size);
static void drawWorld(Display *dpy, GC gc, Pixmap pic, int xOff, int size,
const XPoint data[]);
static int yinYangX(int size, int y);
/**********************************************************************
* Global Variables
**********************************************************************/
void drawStone_newPics(ButEnv *env, Rnd *rnd, int baseColor,
Pixmap *stonePixmap, Pixmap *maskBitmap, int size,
bool color) {
XImage *stones;
GC gc1;
Display *dpy = env->dpy;
uchar *maskData;
int maxRadius;
int maskW;
int x, y, i, wBright, bBright, yyx;
XGCValues values;
float bright, lambertian, z;
float wStripeLoc, wStripeColor;
WhiteDesc white[DRAWSTONE_NUMWHITE];
int sizeLimit;
stones = butEnv_imageCreate(env, size * (DRAWSTONE_NUMWHITE + 1), size);
maskW = (size * 6 + 7) >> 3;
maskData = wms_malloc(maskW * size);
memset(maskData, 0, maskW * size);
for (i = 0; i < DRAWSTONE_NUMWHITE; ++i) {
decideAppearance(&white[i], size, rnd);
}
maxRadius = size * size;
sizeLimit = (int)((size - butEnv_fontH(env, 0) * 0.14) *
(size - butEnv_fontH(env, 0) * 0.14));
if (sizeLimit > ((size - 1) * (size - 1)))
sizeLimit = (size - 1) * (size - 1);
for (y = 0; y < size; ++y) {
yyx = yinYangX(size, y);
for (x = 0; x < size; ++x) {
/*
* Here we build the masks. We need three basic masks; the solid
* circular mask, and two dithered masks used for semitransparent
* stones.
* Then after that we have the yin yang mask. We have the world masks
* too, but we make those in a separate function.
*/
if (((size - 1) - (x+x)) * ((size - 1) - (x+x)) +
((size - 1) - (y+y)) * ((size - 1) - (y+y)) <= maxRadius) {
maskData[(x >> 3) + (y * maskW)] |= (1 << (x & 7));
x += size;
if ((x & 1) == (y & 1))
maskData[(x >> 3) + (y * maskW)] |= (1 << (x & 7));
x += size;
if ((x & 1) == (y & 1))
maskData[(x >> 3) + (y * maskW)] |= (1 << (x & 7));
x += size;
if (x - size*3 < yyx)
maskData[(x >> 3) + (y * maskW)] |= (1 << (x & 7));
x -= size*3;
/*
* Now we do the actual stone. If it's a greyscale/b&w display, it's
* easy because there is no rendering going on.
*/
if (!color) {
XPutPixel(stones, x, y, butEnv_color(env, BUT_BLACK));
if (((size - 1) - (x+x)) * ((size - 1) - (x+x)) +
((size - 1) - (y+y)) * ((size - 1) - (y+y)) <
sizeLimit) {
for (i = 0; i < DRAWSTONE_NUMWHITE; ++i) {
XPutPixel(stones, x+size*(i+1), y, butEnv_color(env, BUT_WHITE));
}
} else {
for (i = 0; i < DRAWSTONE_NUMWHITE; ++i) {
XPutPixel(stones, x+size*(i+1), y, butEnv_color(env, BUT_BLACK));
}
}
} else {
/*
* All right, time to add some color. First we calculate the
* cosine of the angle of reflection to the angle of the viewer.
* This is the basic quantity used to calculate the amount of
* light seen in phong shading. You raise this value to a
* power; the higher the power, the "shinier" the object you are
* rendering. For the black stones, which aren't very shiny,
* I use bright^4. For the white stones, which are very shiny,
* I use bright^32. Then you multiply this value by the
* intensity of the object at the point of rendering, add a
* little bit of lambertian reflection and a tiny bit of ambient
* light, and you're done!
*/
bright = calcCosAngleReflection2View((size - 1) - (x+x),
(size - 1) - (y + y),
size+size, &lambertian, &z);
bright *= bright;
bright *= bright;
bBright = bright*165.0 + lambertian*10.0 - 5.0;
bright *= bright;
bright *= bright;
bright *= bright;
if (bBright > 255)
bBright = 255;
if (bBright < 0)
bBright = 0;
XPutPixel(stones, x, y, butEnv_color(env, baseColor + bBright));
/*
* OK, the black stones are done. Now for the white stones.
* Here we have to add the stripes. The algorithm for stripe
* intensity is just something I made up. I kept tweaking
* parameters and screwing around with it until it looked sort
* of like my stones. The stripes are too regular, some day I
* may go back and change that, but for now it is acceptable
* looking IMHO.
*/
for (i = 0; i < DRAWSTONE_NUMWHITE; ++i) {
wStripeLoc = (x*white[i].cosTheta - y*white[i].sinTheta) +
white[i].xAdd;
wStripeColor = fmod(wStripeLoc + (z * z * z * white[i].zMul) *
white[i].stripeWidth,
white[i].stripeWidth) / white[i].stripeWidth;
wStripeColor = wStripeColor * white[i].stripeMul - 0.5;
if (wStripeColor < 0.0)
wStripeColor = -2.0 * wStripeColor;
if (wStripeColor > 1.0)
wStripeColor = 1.0;
wStripeColor = wStripeColor * 0.15 + 0.85;
wBright = bright*bright*250.0 +
wStripeColor * (lambertian*120.0 + 110.0);
if (wBright > 255)
wBright = 255;
if (wBright < 0)
wBright = 0;
XPutPixel(stones, x+(i+1)*size, y,
butEnv_color(env, baseColor + wBright));
}
}
}
}
}
*stonePixmap =
XCreatePixmap(dpy, RootWindow(dpy, DefaultScreen(dpy)),
size * (DRAWSTONE_NUMWHITE + 1),
size, DefaultDepth(dpy, DefaultScreen(dpy)));
XPutImage(dpy, *stonePixmap, env->gc2, stones, 0,0, 0,0,
size * (DRAWSTONE_NUMWHITE + 1), size);
butEnv_imageDestroy(stones);
*maskBitmap =
XCreateBitmapFromData(dpy, RootWindow(dpy, DefaultScreen(dpy)),
(void *)maskData, maskW<<3, size);
/*
* The "void *" above is because maskData should be a uchar, but the
* function prototype specifies a char.
*/
wms_free(maskData);
values.graphics_exposures = False;
gc1 = XCreateGC(dpy, *maskBitmap, GCGraphicsExposures, &values);
/* Do that whole world thing, you know, the world thing. */
XSetForeground(dpy, gc1, 1);
drawNngs(dpy, gc1, *maskBitmap, size*4, size);
drawIgs(dpy, gc1, *maskBitmap, size*5, size);
XSetFunction(dpy, gc1, GXand);
XCopyArea(dpy, *maskBitmap, *maskBitmap, gc1, 0,0, size,size, size*4,0);
XCopyArea(dpy, *maskBitmap, *maskBitmap, gc1, 0,0, size,size, size*5,0);
}
/*
* Viewing vector is simply "z".
* I model the stones as the top part of the sphere with the viewer looking
* straight down on them. lx*i+ly*j+lz*k is the angle of incident light.
* If you draw out the vectors and work out the equation, you'll notice that
* it very nicely simplifies down to what you get here. The lambertian
* intensity (lambertian) and the z magnitude of the surface normal (z)
* aren't really related to the cosine being calculated, but they share
* many operations with it so it saves CPU time to calculate them at the
* same time.
*/
static float calcCosAngleReflection2View(int x, int y, int r,
float *lambertian, float *z) {
const float lx = 0.35355339, ly = 0.35355339, lz = 0.8660254;
float nx, ny, nz, rz;
float nDotL;
nz = sqrt((double)(r * r - x * x - y * y));
*z = 1.0 - (nz / r);
nx = (float)x;
ny = (float)y;
nDotL = (nx*lx + ny*ly + nz*lz) / r;
rz = (2.0 * nz * nDotL) / r - lz;
*lambertian = nDotL;
return(rz);
}
/*
* drawNngs and drawIgs are a list of vectors to draw to outline the world.
* I took GIFs produced by XGlobe, which got it's data from the
* CIA World Data Bank II map database. Then I wrote a program that
* traced the outlines of the continents of those gifs, clipped out
* unnecessare points, and saved the results as these list of points for
* the polygons. Pretty cool, huh?
*/
static void drawNngs(Display *dpy, GC gc, Pixmap pic, int xOff, int size) {
static const XPoint nngsData[] = {
{120,0},{145,0},{147,2},{153,2},{155,4},{157,4},{159,6},{161,6},{161,9},
{159,11},{159,17},{158,17},{156,15},{152,15},{148,11},{146,11},{140,5},
{138,5},{136,3},{130,3},{129,2},{128,2},{126,4},{126,5},{127,6},{131,6},
{133,8},{135,8},{137,10},{137,13},{135,15},{134,15},{132,13},{128,13},
{126,11},{124,11},{124,9},{123,8},{122,8},{119,11},{119,13},{116,13},
{116,7},{115,6},{114,6},{113,7},{113,13},{109,13},{105,17},{105,18},
{107,20},{111,20},{113,22},{117,22},{117,26},{118,27},{119,27},{120,26},
{120,22},{122,22},{123,21},{123,20},{122,19},{122,14},{125,14},{127,16},
{131,16},{133,18},{136,18},{138,16},{139,16},{145,22},{147,22},{149,24},
{151,24},{151,28},{153,30},{157,30},{157,33},{150,33},{150,29},{149,28},
{148,28},{147,29},{145,29},{142,32},{142,33},{143,34},{147,34},{147,37},
{145,37},{143,39},{140,39},{138,37},{137,37},{133,41},{133,43},{131,43},
{123,51},{123,53},{119,57},{117,57},{113,61},{113,66},{115,68},{115,71},
{113,73},{112,73},{110,71},{110,67},{106,63},{99,63},{97,65},{87,65},
{85,67},{83,67},{81,69},{81,75},{79,77},{79,82},{84,87},{85,87},{86,86},
{90,86},{92,84},{92,82},{94,80},{99,80},{99,85},{97,87},{97,90},{99,92},
{105,92},{107,94},{107,99},{105,101},{105,102},{110,107},{111,107},
{112,106},{117,106},{119,108},{120,108},{122,106},{122,104},{124,102},
{128,102},{130,100},{133,100},{135,102},{139,102},{141,104},{155,104},
{155,106},{159,110},{161,110},{165,114},{171,114},{173,116},{175,116},
{177,118},{177,122},{179,124},{179,126},{181,128},{185,128},{187,130},
{189,130},{191,132},{193,132},{195,134},{199,134},{203,138},{205,138},
{207,140},{207,147},{205,149},{205,151},{199,157},{199,161},{197,163},
{197,167},{195,169},{195,171},{191,175},{191,177},{187,177},{185,179},
{183,179},{181,181},{179,181},{177,183},{177,185},{175,187},{175,189},
{163,201},{159,201},{157,203},{157,205},{155,207},{153,207},{151,209},
{149,209},{138,220},{138,221},{139,222},{139,223},{135,227},{135,230},
{137,232},{137,233},{132,233},{130,231},{128,231},{128,229},{126,227},
{126,220},{128,218},{128,217},{126,215},{126,212},{128,210},{128,204},
{130,202},{130,198},{132,196},{132,186},{134,184},{134,169},{128,163},
{126,163},{124,161},{122,161},{122,157},{118,153},{118,151},{116,149},
{116,147},{110,141},{110,136},{112,134},{112,126},{114,126},{116,124},
{116,122},{119,119},{119,118},{118,117},{118,111},{115,108},{114,108},
{113,109},{113,111},{110,111},{108,109},{106,109},{102,105},{100,105},
{100,103},{96,99},{94,99},{92,97},{88,97},{83,92},{82,92},{81,93},
{76,93},{74,91},{72,91},{70,89},{68,89},{64,85},{64,77},{60,73},{60,65},
{57,62},{56,62},{55,63},{55,64},{57,66},{57,74},{59,76},{59,77},{56,77},
{56,73},{52,69},{52,68},{54,66},{54,65},{52,63},{52,57},{50,55},{50,48},
{52,46},{52,44},{54,42},{54,40},{60,34},{60,32},{62,30},{62,28},{63,27},
{63,26},{62,25},{62,24},{67,19},{67,18},{66,17},{62,17},{62,16},{64,16},
{66,14},{68,14},{70,12},{72,12},{74,10},{76,10},{78,8},{82,8},{84,6},
{87,6},{88,7},{89,7},{90,6},{91,6},{93,8},{94,8},{98,4},{104,4},{106,2},
{107,2},{107,6},{108,7},{109,7},{110,6},{110,2},{111,2},{111,4},{112,5},
{113,5},{114,4},{114,2},{118,2},{119,1},{-1,-1},{168,10},{173,10},
{175,12},{175,13},{172,13},{170,11},{168,11},{-1,-1},{186,14},{189,14},
{197,22},{199,22},{201,24},{205,24},{213,32},{215,32},{219,36},{219,38},
{221,40},{221,44},{225,48},{225,50},{226,51},{227,51},{228,50},{229,50},
{235,56},{235,58},{239,62},{239,64},{241,66},{241,68},{243,70},{243,72},
{245,74},{245,76},{247,78},{247,82},{249,84},{249,88},{251,90},{251,94},
{253,96},{253,104},{255,106},{255,137},{254,137},{254,119},{251,116},
{250,116},{249,117},{248,117},{247,116},{246,116},{245,117},{242,117},
{242,115},{238,111},{238,107},{232,101},{232,97},{230,95},{230,87},
{228,85},{228,83},{226,81},{226,66},{227,65},{227,64},{226,63},{226,61},
{224,59},{224,53},{222,51},{220,51},{216,47},{216,45},{212,41},{212,38},
{213,37},{213,36},{212,35},{210,35},{202,27},{198,27},{190,19},{190,17},
{188,15},{186,15},{-1,-1},{110,76},{113,76},{115,78},{117,78},{119,80},
{121,80},{123,82},{125,82},{125,83},{123,83},{120,86},{120,87},{121,88},
{121,89},{118,89},{118,86},{119,85},{119,84},{116,81},{114,81},{112,79},
{106,79},{106,78},{108,78},{109,77},{-1,-1},{128,84},{135,84},{137,86},
{139,86},{139,87},{135,87},{133,89},{132,89},{130,87},{126,87},{126,86},
{127,85},{-1,-1},{142,86},{143,86},{143,89},{142,89},{142,87},{-1,-1},
{88,128},{89,128},{89,129},{88,129},{-1,-1},{254,142},{255,142},
{255,143},{254,143},{-1,-1},{250,162},{251,162},{251,165},{250,165},
{250,163},{-1,-1},{146,228},{149,228},{149,229},{146,229},{-1,-1},
{140,242},{143,242},{143,243},{141,243},{139,245},{137,245},{136,246},
{136,247},{137,248},{137,249},{135,251},{133,251},{132,252},{132,253},
{133,254},{136,254},{138,252},{139,252},{141,254},{142,254},{144,252},
{154,252},{156,250},{162,250},{164,248},{167,248},{167,249},{165,251},
{161,251},{159,253},{151,253},{149,255},{106,255},{104,253},{98,253},
{98,250},{107,250},{108,251},{109,251},{110,250},{124,250},{126,248},
{130,248},{134,244},{138,244},{139,243},{-2,-2}};
drawWorld(dpy, gc, pic, xOff, size, nngsData);
}
static void drawIgs(Display *dpy, GC gc, Pixmap pic, int xOff, int size) {
static const XPoint igsData[] = {
{106,2},{115,2},{117,4},{121,4},{123,6},{126,6},{128,4},{128,2},{131,2},
{135,6},{143,6},{145,8},{163,8},{164,9},{165,9},{166,8},{166,6},{171,6},
{173,8},{177,8},{179,10},{181,10},{183,12},{185,12},{187,14},{189,14},
{191,16},{191,23},{190,23},{190,21},{186,17},{180,17},{174,11},{167,11},
{165,13},{165,15},{163,15},{161,17},{159,17},{157,19},{157,23},{155,25},
{155,27},{152,27},{150,25},{150,18},{151,17},{151,16},{150,15},{149,15},
{147,17},{133,17},{128,22},{128,23},{129,24},{135,24},{135,28},{137,30},
{137,31},{135,33},{134,33},{134,29},{133,28},{132,28},{131,29},{131,33},
{127,37},{125,37},{121,41},{117,41},{111,47},{111,48},{113,50},{113,53},
{111,55},{106,55},{106,51},{104,49},{104,48},{105,47},{105,46},{104,45},
{103,45},{101,47},{100,47},{98,45},{97,45},{95,47},{95,48},{97,50},
{101,50},{101,51},{97,51},{95,53},{95,56},{97,58},{97,65},{91,71},
{91,72},{92,73},{93,73},{94,72},{95,72},{95,77},{93,79},{92,79},{92,75},
{91,74},{90,74},{89,75},{87,75},{85,77},{83,77},{81,79},{77,79},{73,83},
{73,85},{71,87},{68,87},{68,84},{69,83},{69,82},{68,81},{67,81},{63,85},
{63,88},{67,92},{67,103},{65,103},{59,109},{58,109},{58,105},{53,100},
{52,100},{49,103},{49,108},{55,114},{55,128},{59,132},{61,132},{63,134},
{63,135},{61,135},{59,137},{59,138},{61,140},{63,140},{65,142},{75,142},
{79,146},{93,146},{93,147},{91,147},{89,149},{89,151},{88,151},{88,149},
{86,147},{70,147},{68,145},{62,145},{56,139},{54,139},{52,137},{52,135},
{50,133},{50,131},{49,130},{48,130},{47,131},{46,131},{46,130},{47,129},
{47,128},{44,125},{44,121},{40,117},{40,116},{45,116},{48,119},{49,119},
{50,118},{50,115},{48,113},{48,111},{46,109},{46,106},{48,104},{48,93},
{47,92},{46,92},{45,93},{44,93},{42,91},{42,90},{44,88},{44,87},{42,85},
{42,81},{40,79},{39,79},{23,95},{23,99},{21,101},{21,108},{23,110},
{23,111},{21,113},{21,115},{20,115},{20,109},{19,108},{18,108},{17,109},
{16,109},{16,88},{18,86},{18,83},{16,81},{16,78},{18,76},{18,75},{16,73},
{15,73},{13,75},{13,77},{11,79},{11,81},{9,83},{9,85},{7,87},{7,89},
{5,91},{4,91},{4,90},{6,88},{6,84},{8,82},{8,78},{10,76},{10,74},{14,70},
{14,66},{16,64},{16,62},{20,58},{20,56},{24,52},{24,50},{34,40},{34,38},
{36,36},{38,36},{40,34},{40,32},{42,32},{50,24},{52,24},{56,20},{58,20},
{62,16},{64,16},{66,14},{68,14},{70,12},{72,12},{74,10},{76,10},{78,8},
{84,8},{86,6},{90,6},{92,4},{93,4},{94,5},{95,5},{96,4},{104,4},{105,3},
{-1,-1},{134,36},{135,36},{137,38},{139,38},{139,41},{135,41},{133,43},
{133,44},{135,46},{135,47},{133,49},{133,53},{131,53},{129,55},{127,55},
{125,57},{117,57},{115,59},{115,61},{112,61},{112,58},{118,52},{124,52},
{130,46},{130,44},{131,43},{131,42},{130,41},{130,40},{132,40},{134,38},
{134,37},{-1,-1},{92,86},{93,86},{95,88},{95,91},{93,93},{93,94},{95,96},
{97,96},{97,98},{99,100},{101,100},{101,103},{98,106},{98,107},{99,108},
{103,108},{103,111},{101,113},{101,115},{98,115},{95,112},{94,112},
{93,113},{92,113},{92,110},{94,108},{94,105},{92,103},{92,102},{93,102},
{95,104},{96,104},{97,103},{97,102},{96,101},{96,99},{95,98},{94,98},
{93,99},{90,99},{90,95},{88,93},{88,92},{90,90},{90,88},{91,87},{-1,-1},
{80,112},{83,112},{87,116},{87,117},{85,117},{83,119},{83,122},{85,124},
{85,125},{83,127},{83,129},{81,131},{81,135},{79,137},{76,137},{74,135},
{68,135},{68,131},{66,129},{66,124},{68,124},{76,116},{78,116},{80,114},
{80,113},{-1,-1},{90,124},{93,124},{95,126},{96,126},{98,124},{99,124},
{99,125},{97,127},{91,127},{90,128},{90,129},{91,130},{95,130},{95,131},
{93,131},{92,132},{92,133},{93,134},{93,136},{95,138},{95,139},{92,139},
{91,138},{90,138},{89,139},{89,141},{88,141},{86,139},{86,130},{88,128},
{88,126},{89,125},{-1,-1},{104,124},{107,124},{107,127},{105,129},
{105,131},{104,131},{104,125},{-1,-1},{114,128},{117,128},{119,130},
{119,132},{121,134},{122,134},{123,133},{123,132},{122,131},{122,130},
{123,130},{124,131},{125,131},{126,130},{127,130},{129,132},{133,132},
{135,134},{139,134},{141,136},{143,136},{147,140},{149,140},{149,144},
{155,150},{155,151},{150,151},{144,145},{141,145},{137,149},{134,149},
{131,146},{130,146},{129,147},{128,147},{128,141},{126,139},{124,139},
{122,137},{116,137},{114,135},{114,133},{112,131},{112,130},{113,129},
{-1,-1},{100,132},{101,132},{103,134},{103,137},{102,137},{102,135},
{100,133},{-1,-1},{106,134},{111,134},{111,135},{106,135},{-1,-1},
{158,136},{161,136},{161,137},{157,141},{152,141},{152,140},{154,140},
{157,137},{-1,-1},{98,146},{103,146},{103,147},{101,149},{99,149},
{97,151},{96,151},{96,148},{97,147},{-1,-1},{174,148},{177,148},
{179,150},{179,151},{178,151},{176,149},{174,149},{-1,-1},{110,152},
{113,152},{114,153},{115,153},{116,152},{117,152},{119,154},{125,154},
{125,159},{124,160},{124,161},{127,164},{129,164},{131,166},{132,166},
{134,164},{134,158},{136,156},{136,152},{139,152},{139,156},{143,160},
{143,162},{145,164},{145,168},{147,170},{149,170},{151,172},{151,174},
{157,180},{157,193},{155,195},{155,197},{149,203},{149,205},{147,207},
{132,207},{128,203},{126,203},{126,201},{125,200},{124,200},{123,201},
{122,201},{122,199},{118,195},{109,195},{107,197},{103,197},{101,199},
{95,199},{93,201},{88,201},{86,199},{86,195},{84,193},{84,191},{80,187},
{80,183},{78,181},{78,176},{80,176},{84,172},{88,172},{90,170},{92,170},
{94,168},{94,164},{96,164},{102,158},{105,158},{107,160},{108,160},
{110,158},{110,156},{111,155},{111,154},{110,153},{-1,-1},{208,164},
{209,164},{209,165},{207,167},{204,167},{204,166},{206,166},{207,165},
{-1,-1},{180,172},{183,172},{185,174},{185,177},{184,177},{180,173},
{-1,-1},{188,202},{189,202},{193,206},{193,207},{187,213},{186,213},
{186,208},{188,206},{188,203},{-1,-1},{144,210},{145,210},{145,213},
{143,215},{140,215},{138,213},{138,212},{142,212},{143,211},{-1,-1},
{180,212},{183,212},{183,215},{181,215},{175,221},{170,221},{170,218},
{172,218},{174,216},{176,216},{179,213},{-1,-1},{90,244},{101,244},
{102,245},{103,245},{104,244},{109,244},{111,246},{112,246},{114,244},
{117,244},{118,245},{119,245},{120,244},{129,244},{131,246},{141,246},
{143,248},{149,248},{149,249},{147,251},{143,251},{141,253},{139,253},
{137,255},{106,255},{104,253},{96,253},{94,251},{90,251},{88,249},
{84,249},{82,247},{78,247},{78,246},{88,246},{89,245},{-1,-1},{152,252},
{155,252},{155,253},{152,253},{-2,-2}};
drawWorld(dpy, gc, pic, xOff, size, igsData);
}
/*
* Here we take the world polygon point list and trace it out into a bitmap.
*/
static void drawWorld(Display *dpy, GC gc, Pixmap pic, int xOff, int size,
const XPoint data[]) {
XPoint temp[344];
int i, numPoints;
numPoints = 0;
for (i = 0;; ++i) {
if (data[i].x < 0) {
if (numPoints > 2) {
XFillPolygon(dpy, pic, gc, temp, numPoints, Complex, CoordModeOrigin);
}
numPoints = 0;
if (data[i].x == -2)
return;
} else {
temp[numPoints].x = ((data[i].x * (size + 1)) >> 8) + xOff;
temp[numPoints].y = ((data[i].y * (size + 1)) >> 8);
if ((numPoints == 0) || (temp[numPoints - 1].x != temp[numPoints].x) ||
(temp[numPoints - 1].y != temp[numPoints].y)) {
++numPoints;
assert(numPoints <= 344);
}
}
}
}
/*
* Returns the answer:
* Where is the x coordinate of the "seam" in the yin yang symbol for this
* particular y value?
*/
static int yinYangX(int size, int y) {
float center;
float fy = y + 0.5;
if (y < size / 2) {
center = (float)size * 0.25;
return((int)((float)size * 0.5 +
sqrt(center * center -
(fy - center) * (fy - center)) +
0.5));
} else {
center = (float)size * 0.75;
return((int)((float)size * 0.5 -
sqrt((float)(size * size) * 0.0625 -
(fy - center) * (fy - center)) +
0.5));
}
}
static void decideAppearance(WhiteDesc *desc, int size, Rnd *rnd) {
double minStripeW, maxStripeW, theta;
minStripeW = (float)size / 20.0;
if (minStripeW < 2.5)
minStripeW = 2.5;
maxStripeW = (float)size / 5.0;
if (maxStripeW < 4.0)
maxStripeW = 4.0;
theta = rnd_float(rnd) * 2.0 * M_PI;
desc->cosTheta = cos(theta);
desc->sinTheta = sin(theta);
desc->stripeWidth = minStripeW +
(rnd_float(rnd) * (maxStripeW - minStripeW));
desc->xAdd = rnd_float(rnd) * desc->stripeWidth +
(float)size * 3; /* Make sure that all x's are positive! */
desc->stripeMul = rnd_float(rnd) * 4.0 + 1.5;
desc->zMul = rnd_float(rnd) * 650.0 + 70.0;
}
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