* implied warranty.
*/
-#include <X11/Intrinsic.h>
-
#ifdef STANDALONE
-# define PROGCLASS "Queens"
-# define HACK_INIT init_queens
-# define HACK_DRAW draw_queens
-# define HACK_RESHAPE reshape_queens
-# define HACK_HANDLE_EVENT queens_handle_event
-# define EVENT_MASK PointerMotionMask
-# define queens_opts xlockmore_opts
-
-#define DEFAULTS "*delay: 20000 \n" \
- "*showFPS: False \n" \
- "*wireframe: False \n" \
+#define DEFAULTS "*delay: 20000 \n" \
+ "*showFPS: False \n" \
+ "*wireframe: False \n" \
+# define refresh_queens 0
# include "xlockmore.h"
#else
#ifdef USE_GL
-#include <GL/glu.h>
#include "gltrackball.h"
#undef countof
{"-flat", ".queens.flat", XrmoptionNoArg, "true" },
};
-int rotate, wire, clearbits, flat;
+static int rotate, wire, clearbits, flat;
static argtype vars[] = {
{&rotate, "rotate", "Rotate", "True", t_Bool},
{&flat, "flat", "Flat", "False", t_Bool},
};
-ModeSpecOpt queens_opts = {countof(opts), opts, countof(vars), vars, NULL};
+ENTRYPOINT ModeSpecOpt queens_opts = {countof(opts), opts, countof(vars), vars, NULL};
#ifdef USE_MODULES
ModStruct queens_description =
#endif
+#define NONE 0
+#define QUEEN 1
+#define MINBOARD 5
+#define MAXBOARD 10
+#define COLORSETS 5
+
typedef struct {
GLXContext *glx_context;
Window window;
trackball_state *trackball;
Bool button_down_p;
-} Queenscreen;
-
-static Queenscreen *qs = NULL;
+ GLfloat position[4];
-#include <math.h>
-#include <sys/time.h>
-#include <stdio.h>
-#include <stdlib.h>
+ int board[MAXBOARD][MAXBOARD];
+ int steps, colorset, BOARDSIZE;
+ double theta;
-#ifndef M_PI
-#define M_PI 3.14159265
-#endif
+} Queenscreen;
-#define NONE 0
-#define QUEEN 1
-#define MINBOARD 5
-#define MAXBOARD 10
-#define COLORSETS 5
+static Queenscreen *qss = NULL;
/* definition of white/black colors */
-GLfloat colors[COLORSETS][2][3] =
+static const 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}},
{{0.9, 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
+ENTRYPOINT Bool
queens_handle_event (ModeInfo *mi, XEvent *event)
{
- Queenscreen *c = &qs[MI_SCREEN(mi)];
+ Queenscreen *qs = &qss[MI_SCREEN(mi)];
if (event->xany.type == ButtonPress &&
event->xbutton.button == Button1)
{
- c->button_down_p = True;
- gltrackball_start (c->trackball,
+ qs->button_down_p = True;
+ gltrackball_start (qs->trackball,
event->xbutton.x, event->xbutton.y,
MI_WIDTH (mi), MI_HEIGHT (mi));
return True;
else if (event->xany.type == ButtonRelease &&
event->xbutton.button == Button1)
{
- c->button_down_p = False;
+ qs->button_down_p = False;
return True;
}
else if (event->xany.type == ButtonPress &&
(event->xbutton.button == Button4 ||
event->xbutton.button == Button5))
{
- gltrackball_mousewheel (c->trackball, event->xbutton.button, 5,
+ gltrackball_mousewheel (qs->trackball, event->xbutton.button, 5,
!event->xbutton.state);
return True;
}
else if (event->xany.type == MotionNotify &&
- c->button_down_p)
+ qs->button_down_p)
{
- gltrackball_track (c->trackball,
+ gltrackball_track (qs->trackball,
event->xmotion.x, event->xmotion.y,
MI_WIDTH (mi), MI_HEIGHT (mi));
return True;
/* returns true if placing a queen on column c causes a conflict */
-int conflictsCols(int c) {
+static int conflictsCols(Queenscreen *qs, int c)
+{
int i;
- for(i = 0; i < BOARDSIZE; ++i)
- if(board[i][c])
+ for(i = 0; i < qs->BOARDSIZE; ++i)
+ if(qs->board[i][c])
return 1;
return 0;
}
/* returns true if placing a queen on (r,c) causes a diagonal conflict */
-int conflictsDiag(int r, int c) {
+static int conflictsDiag(Queenscreen *qs, int r, int c)
+{
int i;
/* positive slope */
int n = r < c ? r : c;
- for(i = 0; i < BOARDSIZE-abs(r-c); ++i)
- if(board[r-n+i][c-n+i])
+ for(i = 0; i < qs->BOARDSIZE-abs(r-c); ++i)
+ if(qs->board[r-n+i][c-n+i])
return 1;
/* negative slope */
- n = r < BOARDSIZE - (c+1) ? r : BOARDSIZE - (c+1);
- for(i = 0; i < BOARDSIZE-abs(BOARDSIZE - (1+r+c)); ++i)
- if(board[r-n+i][c+n-i])
+ n = r < qs->BOARDSIZE - (c+1) ? r : qs->BOARDSIZE - (c+1);
+ for(i = 0; i < qs->BOARDSIZE-abs(qs->BOARDSIZE - (1+r+c)); ++i)
+ if(qs->board[r-n+i][c+n-i])
return 1;
return 0;
}
/* returns true if placing a queen at (r,c) causes a conflict */
-int conflicts(int r, int c) {
- return !conflictsCols(c) ? conflictsDiag(r, c) : 1;
+static int conflicts(Queenscreen *qs, int r, int c)
+{
+ return !conflictsCols(qs, c) ? conflictsDiag(qs, r, c) : 1;
}
/* clear board */
-void blank(void) {
+static void blank(Queenscreen *qs)
+{
int i, j;
for(i = 0; i < MAXBOARD; ++i)
for(j = 0; j < MAXBOARD; ++j)
- board[i][j] = NONE;
+ qs->board[i][j] = NONE;
}
/* recursively determine solution */
-int findSolution(int row, int col) {
- if(row == BOARDSIZE)
+static int findSolution(Queenscreen *qs, int row, int col)
+{
+ if(row == qs->BOARDSIZE)
return 1;
- while(col < BOARDSIZE) {
- if(!conflicts(row, col)) {
- board[row][col] = 1;
+ while(col < qs->BOARDSIZE) {
+ if(!conflicts(qs, row, col)) {
+ qs->board[row][col] = 1;
- if(findSolution(row+1, 0))
+ if(findSolution(qs, row+1, 0))
return 1;
- board[row][col] = 0;
+ qs->board[row][col] = 0;
}
++col;
}
/** driver for finding solution */
-void go(void) { while(!findSolution(0, random()%BOARDSIZE)); }
+static void go(Queenscreen *qs) { while(!findSolution(qs, 0, random()%qs->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};
+static const GLfloat front_shininess[] = {60.0};
+static const GLfloat front_specular[] = {0.4, 0.4, 0.4, 1.0};
+static const GLfloat ambient[] = {0.3, 0.3, 0.3, 1.0};
+static const GLfloat diffuse[] = {0.8, 0.8, 0.8, 1.0};
/* configure lighting */
-void setup_lights(void) {
+static void setup_lights(Queenscreen *qs)
+{
/* setup twoside lighting */
glLightfv(GL_LIGHT0, GL_AMBIENT, ambient);
glLightfv(GL_LIGHT0, GL_DIFFUSE, diffuse);
- glLightfv(GL_LIGHT0, GL_POSITION, position);
+ glLightfv(GL_LIGHT0, GL_POSITION, qs->position);
glEnable(GL_LIGHTING);
glEnable(GL_LIGHT0);
#define checkImageWidth 8
#define checkImageHeight 8
-GLubyte checkImage[checkImageWidth][checkImageHeight][3];
+/*static GLubyte checkImage[checkImageWidth][checkImageHeight][3];*/
/* return alpha value for fading */
-GLfloat findAlpha(void) {
- return steps < 128 ? steps/128.0 : steps < 1024-128 ?1.0:(1024-steps)/128.0;
+static GLfloat findAlpha(Queenscreen *qs)
+{
+ return qs->steps < 128 ? qs->steps/128.0 : qs->steps < 1024-128 ?1.0:(1024-qs->steps)/128.0;
}
/* draw pieces */
-void drawPieces(void) {
+static void drawPieces(Queenscreen *qs)
+{
int i, j;
- for(i = 0; i < BOARDSIZE; ++i) {
- for(j = 0; j < BOARDSIZE; ++j) {
- if(board[i][j]) {
- glColor3fv(colors[colorset][i%2]);
+ for(i = 0; i < qs->BOARDSIZE; ++i) {
+ for(j = 0; j < qs->BOARDSIZE; ++j) {
+ if(qs->board[i][j]) {
+ glColor3fv(colors[qs->colorset][i%2]);
glCallList(QUEEN);
}
glTranslatef(1.0, 0.0, 0.0);
}
- glTranslatef(-1.0*BOARDSIZE, 0.0, 1.0);
+ glTranslatef(-1.0*qs->BOARDSIZE, 0.0, 1.0);
}
}
/** reflectionboard */
-void draw_reflections(void) {
+static void draw_reflections(Queenscreen *qs)
+{
int i, j;
glEnable(GL_STENCIL_TEST);
glBegin(GL_QUADS);
/* only draw white squares */
- for(i = 0; i < BOARDSIZE; ++i) {
- for(j = (BOARDSIZE+i) % 2; j < BOARDSIZE; j += 2) {
+ for(i = 0; i < qs->BOARDSIZE; ++i) {
+ for(j = (qs->BOARDSIZE+i) % 2; j < qs->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);
glPushMatrix();
glScalef(1.0, -1.0, 1.0);
glTranslatef(0.5, 0.001, 0.5);
- glLightfv(GL_LIGHT0, GL_POSITION, position);
- drawPieces();
+ glLightfv(GL_LIGHT0, GL_POSITION, qs->position);
+ drawPieces(qs);
glPopMatrix();
glDisable(GL_STENCIL_TEST);
/* replace lights */
- glLightfv(GL_LIGHT0, GL_POSITION, position);
+ glLightfv(GL_LIGHT0, GL_POSITION, qs->position);
glEnable(GL_CULL_FACE);
glCullFace(GL_BACK);
}
/* draw board */
-void drawBoard(void) {
+static void drawBoard(Queenscreen *qs)
+{
int i, j;
glBegin(GL_QUADS);
- for(i = 0; i < BOARDSIZE; ++i)
- for(j = 0; j < BOARDSIZE; ++j) {
- int par = (i-j+BOARDSIZE)%2;
- glColor4f(colors[colorset][par][0],
- colors[colorset][par][1],
- colors[colorset][par][2],
+ for(i = 0; i < qs->BOARDSIZE; ++i)
+ for(j = 0; j < qs->BOARDSIZE; ++j) {
+ int par = (i-j+qs->BOARDSIZE)%2;
+ glColor4f(colors[qs->colorset][par][0],
+ colors[qs->colorset][par][1],
+ colors[qs->colorset][par][2],
0.70);
glNormal3f(0.0, 1.0, 0.0);
glVertex3f(i, 0.0, j + 1.0);
glEnd();
}
-void display(Queenscreen *c) {
+static void display(Queenscreen *qs)
+{
glClear(clearbits);
glMatrixMode(GL_MODELVIEW);
/* setup light attenuation */
glEnable(GL_COLOR_MATERIAL);
- glLightf(GL_LIGHT0, GL_CONSTANT_ATTENUATION, 0.8/(0.01+findAlpha()));
+ glLightf(GL_LIGHT0, GL_CONSTANT_ATTENUATION, 0.8/(0.01+findAlpha(qs)));
glLightf(GL_LIGHT0, GL_LINEAR_ATTENUATION, 0.06);
/** setup perspective */
- glTranslatef(0.0, 0.0, -1.5*BOARDSIZE);
+ glTranslatef(0.0, 0.0, -1.5*qs->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);
+ gltrackball_rotate (qs->trackball);
+ glRotatef(qs->theta*100, 0.0, 1.0, 0.0);
+ glTranslatef(-0.5*qs->BOARDSIZE, 0.0, -0.5*qs->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;
+ qs->position[0] = qs->BOARDSIZE/2.0 + qs->BOARDSIZE/1.4*-sin(qs->theta*100*M_PI/180.0);
+ qs->position[2] = qs->BOARDSIZE/2.0 + qs->BOARDSIZE/1.4*cos(qs->theta*100*M_PI/180.0);
+ qs->position[1] = 6.0;
if(!wire) {
glEnable(GL_LIGHTING);
- glLightfv(GL_LIGHT0, GL_POSITION, position);
+ glLightfv(GL_LIGHT0, GL_POSITION, qs->position);
glEnable(GL_LIGHT0);
}
/* draw reflections */
if(!wire) {
- draw_reflections();
+ draw_reflections(qs);
glEnable(GL_BLEND);
}
- drawBoard();
+ drawBoard(qs);
if(!wire)
glDisable(GL_BLEND);
glLightf(GL_LIGHT0, GL_LINEAR_ATTENUATION, 0.1);
glTranslatef(0.5, 0.0, 0.5);
- drawPieces();
+ drawPieces(qs);
/* rotate camera */
- if(!c->button_down_p)
- theta += .002;
+ if(!qs->button_down_p)
+ qs->theta += .002;
/* zero out board, find new solution of size MINBOARD <= i <= MAXBOARD */
- if(++steps == 1024) {
- steps = 0;
- blank();
- BOARDSIZE = MINBOARD + (random() % (MAXBOARD - MINBOARD + 1));
- colorset = (colorset+1)%COLORSETS;
- go();
+ if(++qs->steps == 1024) {
+ qs->steps = 0;
+ blank(qs);
+ qs->BOARDSIZE = MINBOARD + (random() % (MAXBOARD - MINBOARD + 1));
+ qs->colorset = (qs->colorset+1)%COLORSETS;
+ go(qs);
}
}
-int schunks = 15;
-GLfloat spidermodel[][3] =
+static const GLfloat spidermodel[][3] =
{
{0.48, 0.48, 0.22},
{0.48, 0.34, 0.18},
{0.07, 0.00, 0.12},
};
+
#define EPSILON 0.001
/** draws cylindermodel */
-void draw_model(int chunks, GLfloat model[][3], int r) {
+static void draw_model(int chunks, const GLfloat model[][3], int r)
+{
int i = 0;
GLUquadricObj *quadric = gluNewQuadric();
glPushMatrix();
glPopMatrix();
}
-void reshape_queens(ModeInfo *mi, int width, int height) {
+ENTRYPOINT void reshape_queens(ModeInfo *mi, int width, int height)
+{
GLfloat h = (GLfloat) height / (GLfloat) width;
glViewport(0,0, width, height);
glMatrixMode(GL_PROJECTION);
glMatrixMode(GL_MODELVIEW);
}
-void init_queens(ModeInfo *mi) {
+ENTRYPOINT void init_queens(ModeInfo *mi)
+{
int screen = MI_SCREEN(mi);
- Queenscreen *c;
+ Queenscreen *qs;
wire = MI_IS_WIREFRAME(mi);
- if(!qs &&
- !(qs = (Queenscreen *) calloc(MI_NUM_SCREENS(mi), sizeof(Queenscreen))))
+ if(!qss &&
+ !(qss = (Queenscreen *) calloc(MI_NUM_SCREENS(mi), sizeof(Queenscreen))))
return;
- c = &qs[screen];
- c->window = MI_WINDOW(mi);
- c->trackball = gltrackball_init ();
+ qs = &qss[screen];
+ qs->window = MI_WINDOW(mi);
+ qs->trackball = gltrackball_init ();
+
+ qs->BOARDSIZE = 8; /* 8 cuz its classic */
- if((c->glx_context = init_GL(mi)))
+ if((qs->glx_context = init_GL(mi)))
reshape_queens(mi, MI_WIDTH(mi), MI_HEIGHT(mi));
else
MI_CLEARWINDOW(mi);
glClearColor(0.0, 0.0, 0.0, 0.0);
glNewList(QUEEN, GL_COMPILE);
- draw_model(schunks, spidermodel, 24);
+ draw_model(countof(spidermodel), spidermodel, 24);
glEndList();
if(flat)
glEnable(GL_COLOR_MATERIAL);
if(!wire) {
- setup_lights();
+ setup_lights(qs);
glEnable(GL_DEPTH_TEST);
clearbits |= GL_DEPTH_BUFFER_BIT;
clearbits |= GL_STENCIL_BUFFER_BIT;
glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);
/* find a solution */
- go();
+ go(qs);
}
-void draw_queens(ModeInfo *mi) {
- Queenscreen *c = &qs[MI_SCREEN(mi)];
+ENTRYPOINT void draw_queens(ModeInfo *mi)
+{
+ Queenscreen *qs = &qss[MI_SCREEN(mi)];
Window w = MI_WINDOW(mi);
Display *disp = MI_DISPLAY(mi);
- if(!c->glx_context)
+ if(!qs->glx_context)
return;
- glXMakeCurrent(disp, w, *(c->glx_context));
+ glXMakeCurrent(disp, w, *(qs->glx_context));
- display(c);
+ display(qs);
if(mi->fps_p) do_fps(mi);
glFinish();
glXSwapBuffers(disp, w);
}
-void release_queens(ModeInfo *mi) {
- if(qs)
- free((void *) qs);
+ENTRYPOINT void release_queens(ModeInfo *mi)
+{
+ if(qss)
+ free((void *) qss);
+ qss = 0;
- FreeAllGL(MI);
+ FreeAllGL(mi);
}
+XSCREENSAVER_MODULE ("Queens", queens)
+
#endif
projects / xscreensaver / blobdiff