*
* version 1.0 - May 10, 2002
*
- * Copyright (C) 2002 Blair Tennessy (tennessb@unbc.ca)
+ * Copyright (C) 2002 Blair Tennessy (tennessy@cs.ubc.ca)
*
* Permission to use, copy, modify, distribute, and sell this software and its
* documentation for any purpose is hereby granted without fee, provided that
#define countof(x) (sizeof((x))/sizeof((*x)))
static XrmOptionDescRec opts[] = {
- {"+rotate", ".queens.rotate", XrmoptionNoArg, (caddr_t) "false" },
- {"-rotate", ".queens.rotate", XrmoptionNoArg, (caddr_t) "true" },
-/* {"-white", ".queens.white", XrmoptionSepArg, (cadd_t) NULL }, */
-/* {"-black", ".queens.white", XrmoptionSepArg, (cadd_t) NULL }, */
+ {"+rotate", ".queens.rotate", XrmoptionNoArg, "false" },
+ {"-rotate", ".queens.rotate", XrmoptionNoArg, "true" },
+ {"+flat", ".queens.flat", XrmoptionNoArg, "false" },
+ {"-flat", ".queens.flat", XrmoptionNoArg, "true" },
};
-int rotate, wire, clearbits;
+int rotate, wire, clearbits, flat;
static argtype vars[] = {
- {(caddr_t *) &rotate, "rotate", "Rotate", "True", t_Bool},
+ {&rotate, "rotate", "Rotate", "True", t_Bool},
+ {&flat, "flat", "Flat", "False", t_Bool},
};
ModeSpecOpt queens_opts = {countof(opts), opts, countof(vars), vars, NULL};
#define QUEEN 1
#define MINBOARD 5
#define MAXBOARD 10
-#define COLORSETS 3
+#define COLORSETS 5
/* definition of white/black colors */
GLfloat colors[COLORSETS][2][3] =
{
+ {{0.43, 0.54, 0.76}, {0.8, 0.8, 0.8}},
{{0.5, 0.7, 0.9}, {0.2, 0.3, 0.6}},
{{0.53725490196, 0.360784313725, 0.521568627451}, {0.6, 0.6, 0.6}},
- {{1.0, 0.5, 0.0}, {0.5, 0.5, 0.5}},
+ {{0.15, 0.77, 0.54}, {0.5, 0.5, 0.5}},
+ {{0.9, 0.45, 0.0}, {0.5, 0.5, 0.5}},
};
int board[MAXBOARD][MAXBOARD];
int steps = 0, colorset = 0, BOARDSIZE = 8; /* 8 cuz its classic */
+double theta = 0.0;
Bool
queens_handle_event (ModeInfo *mi, XEvent *event)
/** driver for finding solution */
void go(void) { while(!findSolution(0, random()%BOARDSIZE)); }
+/* lighting variables */
+GLfloat front_shininess[] = {60.0};
+GLfloat front_specular[] = {0.4, 0.4, 0.4, 1.0};
+GLfloat ambient[] = {0.3, 0.3, 0.3, 1.0};
+GLfloat diffuse[] = {0.8, 0.8, 0.8, 1.0};
+GLfloat position[] = { 0.0, 5.0, 5.0, 1.0 };
+GLfloat lmodel_ambient[] = {0.6, 0.6, 0.6, 1.0};
+GLfloat lmodel_twoside[] = {GL_TRUE};
+
/* configure lighting */
void setup_lights(void) {
- GLfloat position[] = { 4.0, 8.0, 4.0, 1.0 };
- glEnable(GL_LIGHTING);
+ /* setup twoside lighting */
+ glLightfv(GL_LIGHT0, GL_AMBIENT, ambient);
+ glLightfv(GL_LIGHT0, GL_DIFFUSE, diffuse);
glLightfv(GL_LIGHT0, GL_POSITION, position);
+ glEnable(GL_LIGHTING);
glEnable(GL_LIGHT0);
+
+ /* setup material properties */
+ glMaterialfv(GL_FRONT_AND_BACK, GL_SHININESS, front_shininess);
+ glMaterialfv(GL_FRONT_AND_BACK, GL_SPECULAR, front_specular);
+
+ glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
}
+#define checkImageWidth 8
+#define checkImageHeight 8
+GLubyte checkImage[checkImageWidth][checkImageHeight][3];
+
/* return alpha value for fading */
GLfloat findAlpha(void) {
- return steps < 128 ? steps/128.0 : steps < 512-128 ? 1.0 : (512-steps)/128.0;
+ return steps < 128 ? steps/128.0 : steps < 1024-128 ?1.0:(1024-steps)/128.0;
}
/* draw pieces */
for(i = 0; i < BOARDSIZE; ++i) {
for(j = 0; j < BOARDSIZE; ++j) {
if(board[i][j]) {
- glColor3fv(colors[colorset][i%2]);
+ glColor3fv(colors[colorset][i%2]);
glCallList(QUEEN);
}
}
}
+/** reflectionboard */
+void draw_reflections(void) {
+ int i, j;
+
+ glEnable(GL_STENCIL_TEST);
+ glStencilFunc(GL_ALWAYS, 1, 1);
+ glStencilOp(GL_KEEP, GL_KEEP, GL_REPLACE);
+ glColorMask(0,0,0,0);
+ glDisable(GL_CULL_FACE);
+
+ glDisable(GL_DEPTH_TEST);
+ glBegin(GL_QUADS);
+
+ /* only draw white squares */
+ for(i = 0; i < BOARDSIZE; ++i) {
+ for(j = (BOARDSIZE+i) % 2; j < BOARDSIZE; j += 2) {
+ glVertex3f(i, 0.0, j + 1.0);
+ glVertex3f(i + 1.0, 0.0, j + 1.0);
+ glVertex3f(i + 1.0, 0.0, j);
+ glVertex3f(i, 0.0, j);
+ }
+ }
+ glEnd();
+ glEnable(GL_DEPTH_TEST);
+
+ glColorMask(1, 1, 1, 1);
+ glStencilFunc(GL_EQUAL, 1, 1);
+ glStencilOp(GL_KEEP, GL_KEEP, GL_KEEP);
+
+ glPushMatrix();
+ glScalef(1.0, -1.0, 1.0);
+ glTranslatef(0.5, 0.001, 0.5);
+ glLightfv(GL_LIGHT0, GL_POSITION, position);
+ drawPieces();
+ glPopMatrix();
+ glDisable(GL_STENCIL_TEST);
+
+ /* replace lights */
+ glLightfv(GL_LIGHT0, GL_POSITION, position);
+
+ glEnable(GL_CULL_FACE);
+ glCullFace(GL_BACK);
+ glColorMask(1,1,1,1);
+}
+
/* draw board */
void drawBoard(void) {
int i, j;
for(i = 0; i < BOARDSIZE; ++i)
for(j = 0; j < BOARDSIZE; ++j) {
int par = (i-j+BOARDSIZE)%2;
- glColor3fv(colors[colorset][par]);
+ glColor4f(colors[colorset][par][0],
+ colors[colorset][par][1],
+ colors[colorset][par][2],
+ 0.70);
glNormal3f(0.0, 1.0, 0.0);
glVertex3f(i, 0.0, j + 1.0);
glVertex3f(i + 1.0, 0.0, j + 1.0);
glVertex3f(i + 1.0, 0.0, j);
glVertex3f(i, 0.0, j);
-
- /* draw the bottom, too */
- glNormal3f(0.0, -1.0, 0.0);
- glVertex3f(i, 0.0, j);
- glVertex3f(i + 1.0, 0.0, j);
- glVertex3f(i + 1.0, 0.0, j + 1.0);
- glVertex3f(i, 0.0, j + 1.0);
}
glEnd();
}
-double theta = 0.0;
-
void display(Queenscreen *c) {
glClear(clearbits);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
+ /* setup light attenuation */
+ glEnable(GL_COLOR_MATERIAL);
glLightf(GL_LIGHT0, GL_CONSTANT_ATTENUATION, 0.8/(0.01+findAlpha()));
+ glLightf(GL_LIGHT0, GL_LINEAR_ATTENUATION, 0.06);
- /** setup perspectif */
+ /** setup perspective */
glTranslatef(0.0, 0.0, -1.5*BOARDSIZE);
glRotatef(30.0, 1.0, 0.0, 0.0);
gltrackball_rotate (c->trackball);
glRotatef(theta*100, 0.0, 1.0, 0.0);
glTranslatef(-0.5*BOARDSIZE, 0.0, -0.5*BOARDSIZE);
+ /* find light positions */
+ position[0] = BOARDSIZE/2.0 + BOARDSIZE/1.4*-sin(theta*100*M_PI/180.0);
+ position[2] = BOARDSIZE/2.0 + BOARDSIZE/1.4*cos(theta*100*M_PI/180.0);
+ position[1] = 6.0;
+
+ if(!wire) {
+ glEnable(GL_LIGHTING);
+ glLightfv(GL_LIGHT0, GL_POSITION, position);
+ glEnable(GL_LIGHT0);
+ }
+
+ /* draw reflections */
+ if(!wire) {
+ draw_reflections();
+ glEnable(GL_BLEND);
+ }
drawBoard();
- glTranslatef(0.5, 0.01, 0.5);
+ if(!wire)
+ glDisable(GL_BLEND);
+
+ glLightf(GL_LIGHT0, GL_LINEAR_ATTENUATION, 0.1);
+
+ glTranslatef(0.5, 0.0, 0.5);
drawPieces();
- if (!c->button_down_p)
+ /* rotate camera */
+ if(!c->button_down_p)
theta += .002;
/* zero out board, find new solution of size MINBOARD <= i <= MAXBOARD */
- if(++steps == 512) {
+ if(++steps == 1024) {
steps = 0;
blank();
BOARDSIZE = MINBOARD + (random() % (MAXBOARD - MINBOARD + 1));
MI_CLEARWINDOW(mi);
glClearColor(0.0, 0.0, 0.0, 0.0);
- glNewList(1, GL_COMPILE);
+ glNewList(QUEEN, GL_COMPILE);
draw_model(schunks, spidermodel, 24);
glEndList();
+
+ if(flat)
+ glShadeModel(GL_FLAT);
clearbits = GL_COLOR_BUFFER_BIT;
setup_lights();
glEnable(GL_DEPTH_TEST);
clearbits |= GL_DEPTH_BUFFER_BIT;
+ clearbits |= GL_STENCIL_BUFFER_BIT;
glEnable(GL_CULL_FACE);
glCullFace(GL_BACK);
}