*
* version 1.0 - June 6, 2002
*
- * Copyright (C) 2002 Blair Tennessy (tennessb@unbc.ca)
+ * Copyright (C) 2002-2008 Blair Tennessy (tennessb@unbc.ca)
*
* Permission to use, copy, modify, distribute, and sell this software and its
* documentation for any purpose is hereby granted without fee, provided that
* implied warranty.
*/
-#include <X11/Intrinsic.h>
-
#ifdef STANDALONE
-# define PROGCLASS "Endgame"
-# define HACK_INIT init_chess
-# define HACK_DRAW draw_chess
-# define HACK_RESHAPE reshape_chess
-# define HACK_HANDLE_EVENT chess_handle_event
-# define EVENT_MASK PointerMotionMask
-# define chess_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_chess 0
# include "xlockmore.h"
#else
#ifdef USE_GL
-#include <GL/glu.h>
+#define BOARDSIZE 8
+#define WHITES 5
+
#include "gltrackball.h"
#include "chessmodels.h"
+#include "chessgames.h"
#undef countof
#define countof(x) (sizeof((x))/sizeof((*x)))
static XrmOptionDescRec opts[] = {
- {"+rotate", ".chess.rotate", XrmoptionNoArg, (caddr_t) "false" },
- {"-rotate", ".chess.rotate", XrmoptionNoArg, (caddr_t) "true" },
+ {"+rotate", ".chess.rotate", XrmoptionNoArg, "false" },
+ {"-rotate", ".chess.rotate", XrmoptionNoArg, "true" },
+ {"+reflections", ".chess.reflections", XrmoptionNoArg, "false" },
+ {"-reflections", ".chess.reflections", XrmoptionNoArg, "true" },
+ {"+shadows", ".chess.shadows", XrmoptionNoArg, "false" },
+ {"-shadows", ".chess.shadows", XrmoptionNoArg, "true" },
+ {"+smooth", ".chess.smooth", XrmoptionNoArg, "false" },
+ {"-smooth", ".chess.smooth", XrmoptionNoArg, "true" },
+ {"+classic", ".chess.classic", XrmoptionNoArg, "false" },
+ {"-classic", ".chess.classic", XrmoptionNoArg, "true" },
};
-int rotate;
+static int rotate, reflections, smooth, shadows, classic;
static argtype vars[] = {
- {(caddr_t *) &rotate, "rotate", "Rotate", "True", t_Bool},
+ {&rotate, "rotate", "Rotate", "True", t_Bool},
+ {&reflections, "reflections", "Reflections", "True", t_Bool},
+ {&shadows, "shadows", "Shadows", "True", t_Bool},
+ {&smooth, "smooth", "Smooth", "True", t_Bool},
+ {&classic, "classic", "Classic", "False", t_Bool},
};
-ModeSpecOpt chess_opts = {countof(opts), opts, countof(vars), vars, NULL};
+ENTRYPOINT ModeSpecOpt chess_opts = {countof(opts), opts, countof(vars), vars, NULL};
#ifdef USE_MODULES
ModStruct chess_description =
#endif
+#define checkImageWidth 16
+#define checkImageHeight 16
+
typedef struct {
GLXContext *glx_context;
Window window;
trackball_state *trackball;
Bool button_down_p;
-} Chesscreen;
-static Chesscreen *qs = NULL;
+ ChessGame game;
+ int oldwhite;
-#include <math.h>
-#include <sys/time.h>
-#include <stdio.h>
-#include <stdlib.h>
+ /** definition of white/black (orange/gray) colors */
+ GLfloat colors[2][3];
-#ifndef M_PI
-#define M_PI 3.14159265
-#endif
+ GLubyte checkImage[checkImageWidth][checkImageHeight][3];
+ GLuint piecetexture, boardtexture;
-#define BOARDSIZE 8
+ int mpiece, tpiece, steps, done;
+ double from[2], to[2];
+ double dx, dz;
+ int moving, take, mc, count, wire;
+ double theta;
-/** definition of white/black (orange/gray) colors */
-GLfloat colors[2][3] =
- {
- {1.0, 0.5, 0.0},
- {0.5, 0.5, 0.5},
- };
+ GLfloat position[4];
+ GLfloat position2[4];
+
+ GLfloat mod;
+
+ GLfloat ground[4];
+
+ int oldgame;
+
+ int poly_counts[PIECES]; /* polygon count of each type of piece */
+
+
+} Chesscreen;
+
+static Chesscreen *qs = NULL;
+
+static const GLfloat MaterialShadow[] = {0.0, 0.0, 0.0, 0.3};
-GLfloat whites[3][3] =
+
+/* i prefer silvertip */
+static const GLfloat whites[WHITES][3] =
{
- {1.0, 0.5, 0.0},
- {0.8, 0.45, 1.0},
- {0.37, 0.56, 0.87},
+ {1.0, 0.55, 0.1},
+ {0.8, 0.52, 0.8},
+ {0.43, 0.54, 0.76},
+ {0.2, 0.2, 0.2},
+ {0.35, 0.60, 0.35},
};
-/* int board[BOARDSIZE][BOARDSIZE]; */
+static void build_colors(Chesscreen *cs)
+{
-#include "chessgames.h"
+ /* find new white */
+ int newwhite = cs->oldwhite;
+ while(newwhite == cs->oldwhite)
+ newwhite = random()%WHITES;
+ cs->oldwhite = newwhite;
+
+ cs->colors[0][0] = whites[cs->oldwhite][0];
+ cs->colors[0][1] = whites[cs->oldwhite][1];
+ cs->colors[0][2] = whites[cs->oldwhite][2];
+}
+
+/* build piece texture */
+static void make_piece_texture(Chesscreen *cs)
+{
+ int i, j, c;
+
+ for (i = 0; i < checkImageWidth; i++) {
+ for (j = 0; j < checkImageHeight; j++) {
+ c = ((j%2) == 0 || i%2 == 0) ? 240 : 180+random()%16;
+ cs->checkImage[i][j][0] = (GLubyte) c;
+ cs->checkImage[i][j][1] = (GLubyte) c;
+ cs->checkImage[i][j][2] = (GLubyte) c;
+ }
+ }
+
+ glGenTextures(1, &cs->piecetexture);
+ glBindTexture(GL_TEXTURE_2D, cs->piecetexture);
-ChessGame game;
-
-/* void buildBoard(void) { */
-/* board[0][5] = BKING; */
-/* board[1][4] = BPAWN; */
-/* board[1][2] = BPAWN; */
-/* board[1][0] = BPAWN; */
-/* board[2][2] = BPAWN; */
-/* board[2][4] = BPAWN; */
-/* board[2][7] = KNIGHT; */
-/* board[3][0] = PAWN; */
-/* board[3][2] = ROOK; */
-/* board[4][0] = PAWN; */
-/* board[4][4] = KING; */
-/* board[4][5] = PAWN; */
-/* board[6][0] = BPAWN; */
-/* board[6][7] = PAWN; */
-/* board[7][0] = BBISHOP; */
-/* } */
-
-void build_colors(void) {
- int white = random()%3;
- colors[0][0] = whites[white][0];
- colors[0][1] = whites[white][1];
- colors[0][2] = whites[white][2];
+ glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_LINEAR);
+ glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,GL_LINEAR);
+ glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_WRAP_S,GL_REPEAT);
+ glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_WRAP_T,GL_REPEAT);
+ glTexImage2D(GL_TEXTURE_2D, 0, 3, checkImageWidth,
+ checkImageHeight, 0, GL_RGB, GL_UNSIGNED_BYTE,
+ &cs->checkImage[0][0]);
}
-/* int moves[MOVES][4] = */
-/* { {3, 2, 6, 2}, */
-/* {7, 0, 6, 1}, */
-/* {6, 2, 6, 6}, */
-/* {0, 5, 0, 4}, */
-/* {6, 6, 0, 6}, */
-/* {0, 4, 1, 3}, */
-/* {2, 7, 1, 5}, */
-/* {2, 2, 3, 2}, */
-/* {0, 6, 0, 3}, */
-/* {1, 3, 2, 2}, */
-/* {0, 3, 6, 3}, */
-/* {3, 2, 4, 2}, /\* pawn to bishop 5 *\/ */
-/* {1, 5, 0, 3}, /\* check *\/ */
-/* {2, 2, 3, 2}, */
-/* {0, 3, 2, 4}, /\* takes pawn *\/ */
-/* {3, 2, 2, 2}, */
-/* {2, 4, 0, 3}, */
-/* {2, 2, 3, 2}, */
-/* {6, 3, 6, 1}, /\* rook takes bishop *\/ */
-/* {6, 0, 7, 0}, */
-/* {6, 1, 3, 1}, */
-/* {3, 2, 2, 3}, */
-/* {3, 1, 3, 3}, */
-/* {0, 0, 2, 3}, */
-/* }; */
-
-/* yay its c */
-int mpiece = 0, tpiece, steps = 0, done = 1;
-double from[2], to[2];
-double dx, dz;
-int moving = 0, take = 0, mc = 0, count = 99, wire = 0;
+/* build board texture (uniform noise in [180,180+50]) */
+static void make_board_texture(Chesscreen *cs)
+{
+ int i, j, c;
+
+ for (i = 0; i < checkImageWidth; i++) {
+ for (j = 0; j < checkImageHeight; j++) {
+ c = 180 + random()%51;
+ cs->checkImage[i][j][0] = (GLubyte) c;
+ cs->checkImage[i][j][1] = (GLubyte) c;
+ cs->checkImage[i][j][2] = (GLubyte) c;
+ }
+ }
+
+ glGenTextures(1, &cs->boardtexture);
+ glBindTexture(GL_TEXTURE_2D, cs->boardtexture);
+
+ glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_LINEAR);
+ glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,GL_LINEAR);
+ glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_WRAP_S,GL_REPEAT);
+ glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_WRAP_T,GL_REPEAT);
+ glTexImage2D(GL_TEXTURE_2D, 0, 3, checkImageWidth,
+ checkImageHeight, 0, GL_RGB, GL_UNSIGNED_BYTE,
+ &cs->checkImage[0][0]);
+}
/** handle X event (trackball) */
-Bool chess_handle_event (ModeInfo *mi, XEvent *event) {
- Chesscreen *c = &qs[MI_SCREEN(mi)];
+ENTRYPOINT Bool chess_handle_event (ModeInfo *mi, XEvent *event)
+{
+ Chesscreen *cs = &qs[MI_SCREEN(mi)];
- if(event->xany.type == ButtonPress && event->xbutton.button & Button1) {
- c->button_down_p = True;
- gltrackball_start (c->trackball,
+ if(event->xany.type == ButtonPress && event->xbutton.button == Button1) {
+ cs->button_down_p = True;
+ gltrackball_start (cs->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;
+ && event->xbutton.button == Button1) {
+ cs->button_down_p = False;
return True;
}
- else if(event->xany.type == MotionNotify && c->button_down_p) {
- gltrackball_track (c->trackball,
+ else if (event->xany.type == ButtonPress &&
+ (event->xbutton.button == Button4 ||
+ event->xbutton.button == Button5 ||
+ event->xbutton.button == Button6 ||
+ event->xbutton.button == Button7))
+ {
+ gltrackball_mousewheel (cs->trackball, event->xbutton.button, 5,
+ !event->xbutton.state);
+ return True;
+ }
+ else if(event->xany.type == MotionNotify && cs->button_down_p) {
+ gltrackball_track (cs->trackball,
event->xmotion.x, event->xmotion.y,
MI_WIDTH (mi), MI_HEIGHT (mi));
return True;
return False;
}
-GLfloat position[] = { 3.0, 8.0, 3.0, 1.0 };
+static const GLfloat diffuse2[] = {1.0, 1.0, 1.0, 1.0};
+/*static const GLfloat ambient2[] = {0.7, 0.7, 0.7, 1.0};*/
+static const GLfloat shininess[] = {60.0};
+static const GLfloat specular[] = {0.4, 0.4, 0.4, 1.0};
/* configure lighting */
-void setup_lights(void) {
+static void setup_lights(Chesscreen *cs)
+{
glEnable(GL_LIGHTING);
- glLightfv(GL_LIGHT0, GL_POSITION, position);
+ glLightfv(GL_LIGHT0, GL_POSITION, cs->position);
+ glLightfv(GL_LIGHT0, GL_DIFFUSE, diffuse2);
glEnable(GL_LIGHT0);
+
+/* glLightModelfv(GL_LIGHT_MODEL_AMBIENT, ambient2); */
+
+ glMaterialfv(GL_FRONT_AND_BACK, GL_SHININESS, shininess);
+ glMaterialfv(GL_FRONT_AND_BACK, GL_SPECULAR, specular);
+
+ glLightfv(GL_LIGHT1, GL_SPECULAR, diffuse2);
+ glLightfv(GL_LIGHT1, GL_DIFFUSE, diffuse2);
+ glEnable(GL_LIGHT1);
}
-/** draw pieces */
-void drawPieces(void) {
+/* draw pieces */
+static void drawPieces(ModeInfo *mi, Chesscreen *cs)
+{
int i, j;
for(i = 0; i < BOARDSIZE; ++i) {
for(j = 0; j < BOARDSIZE; ++j) {
- if(game.board[i][j]) {
- int c = game.board[i][j]/PIECES;
- glColor3fv(colors[c]);
- glCallList(game.board[i][j]%PIECES);
+ if(cs->game.board[i][j]) {
+ int c = cs->game.board[i][j]/PIECES;
+ glColor3fv(cs->colors[c]);
+ glCallList(cs->game.board[i][j]%PIECES);
+ mi->polygon_count += cs->poly_counts[cs->game.board[i][j]%PIECES];
}
glTranslatef(1.0, 0.0, 0.0);
glTranslatef(0.0, 0.0, -1.0*BOARDSIZE);
}
-/** draw a moving piece */
-void drawMovingPiece(void) {
- int piece = mpiece % PIECES;
+/* draw pieces */
+static void drawPiecesShadow(ModeInfo *mi, Chesscreen *cs)
+{
+ int i, j;
+
+ for(i = 0; i < BOARDSIZE; ++i) {
+ for(j = 0; j < BOARDSIZE; ++j) {
+ if(cs->game.board[i][j]) {
+ glColor4f(0.0, 0.0, 0.0, 0.4);
+ glCallList(cs->game.board[i][j]%PIECES);
+ mi->polygon_count += cs->poly_counts[cs->game.board[i][j]%PIECES];
+ }
+
+ glTranslatef(1.0, 0.0, 0.0);
+ }
+
+ glTranslatef(-1.0*BOARDSIZE, 0.0, 1.0);
+ }
+
+ glTranslatef(0.0, 0.0, -1.0*BOARDSIZE);
+}
+
+/* draw a moving piece */
+static void drawMovingPiece(ModeInfo *mi, Chesscreen *cs, int shadow)
+{
+ int piece = cs->mpiece % PIECES;
glPushMatrix();
- glColor3fv(colors[mpiece/PIECES]);
+
+ if(shadow) glColor4fv(MaterialShadow);
+ else glColor3fv(cs->colors[cs->mpiece/PIECES]);
/** assume a queening. should be more general */
- if((mpiece == PAWN && fabs(to[0]) < 0.01) ||
- (mpiece == BPAWN && fabs(to[0]-7.0) < 0.01)) {
- glTranslatef(from[1]+steps*dx, 0.0, from[0]+steps*dz);
- glColor4f(colors[mpiece/7][0], colors[mpiece/7][1], colors[mpiece/7][2],
- (fabs(50.0-steps))/50.0);
- piece = steps < 50 ? PAWN : QUEEN;
+ if((cs->mpiece == PAWN && fabs(cs->to[0]) < 0.01) ||
+ (cs->mpiece == BPAWN && fabs(cs->to[0]-7.0) < 0.01)) {
+ glTranslatef(cs->from[1]+cs->steps*cs->dx, 0.0, cs->from[0]+cs->steps*cs->dz);
+
+ glColor4f(shadow ? MaterialShadow[0] : cs->colors[cs->mpiece/7][0],
+ shadow ? MaterialShadow[1] : cs->colors[cs->mpiece/7][1],
+ shadow ? MaterialShadow[2] : cs->colors[cs->mpiece/7][2],
+ (fabs(50.0-cs->steps))/50.0);
+
+ piece = cs->steps < 50 ? PAWN : QUEEN;
/* what a kludge */
- if(steps == 99)
- mpiece = mpiece == PAWN ? QUEEN : BQUEEN;
+ if(cs->steps == 99)
+ cs->mpiece = cs->mpiece == PAWN ? QUEEN : BQUEEN;
}
- else if(mpiece % PIECES == KNIGHT) {
- glTranslatef(steps < 50 ? from[1] : to[1], 0.0,
- steps < 50 ? from[0] : to[0]);
-
- glColor4f(colors[mpiece/7][0], colors[mpiece/7][1], colors[mpiece/7][2],
- fabs(49-steps)/49.0);
- glScalef(fabs(49-steps)/49.0, fabs(49-steps)/49.0, fabs(49-steps)/49.0);
+ else if(cs->mpiece % PIECES == KNIGHT) {
+ GLfloat shine[1];
+ GLfloat spec[4];
+ GLfloat mult;
+ glTranslatef(cs->steps < 50 ? cs->from[1] : cs->to[1], 0.0,
+ cs->steps < 50 ? cs->from[0] : cs->to[0]);
+
+ mult = cs->steps < 10
+ ? (1.0 - cs->steps / 10.0) : 100 - cs->steps < 10
+ ? (1.0 - (100 - cs->steps) / 10.0) : 0.0;
+
+ shine[0] = mult*shininess[0];
+ spec[0] = mult*specular[0];
+ spec[1] = mult*specular[1];
+ spec[2] = mult*specular[2];
+ spec[3] = 1.0;
+ glMaterialfv(GL_FRONT_AND_BACK, GL_SHININESS, shine);
+ glMaterialfv(GL_FRONT_AND_BACK, GL_SPECULAR, spec);
+
+ glColor4f(shadow ? MaterialShadow[0] : cs->colors[cs->mpiece/7][0],
+ shadow ? MaterialShadow[1] : cs->colors[cs->mpiece/7][1],
+ shadow ? MaterialShadow[2] : cs->colors[cs->mpiece/7][2],
+ fabs(49-cs->steps)/49.0);
+
+ glScalef(fabs(49-cs->steps)/49.0, fabs(49-cs->steps)/49.0, fabs(49-cs->steps)/49.0);
}
else
- glTranslatef(from[1]+steps*dx, 0.0, from[0]+steps*dz);
+ glTranslatef(cs->from[1]+cs->steps*cs->dx, 0.0, cs->from[0]+cs->steps*cs->dz);
- if(!wire)
+ if(!cs->wire)
glEnable(GL_BLEND);
glCallList(piece);
+ mi->polygon_count += cs->poly_counts[cs->mpiece % PIECES];
+
+ glMaterialfv(GL_FRONT_AND_BACK, GL_SHININESS, shininess);
+ glMaterialfv(GL_FRONT_AND_BACK, GL_SPECULAR, specular);
+
glPopMatrix();
- if(!wire)
+ if(!cs->wire)
glDisable(GL_BLEND);
}
/** code to squish a taken piece */
-void drawTakePiece(void) {
- if(!wire)
+static void drawTakePiece(ModeInfo *mi, Chesscreen *cs, int shadow)
+{
+ if(!cs->wire)
glEnable(GL_BLEND);
- glColor4f(colors[tpiece/7][0], colors[tpiece/7][1], colors[tpiece/7][2],
- (100-1.6*steps)/100.0);
+ glColor4f(shadow ? MaterialShadow[0] : cs->colors[cs->tpiece/7][0],
+ shadow ? MaterialShadow[1] : cs->colors[cs->tpiece/7][1],
+ shadow ? MaterialShadow[2] : cs->colors[cs->tpiece/7][2],
+ (100-1.6*cs->steps)/100.0);
- glTranslatef(to[1], 0.0, to[0]);
+ glTranslatef(cs->to[1], 0.0, cs->to[0]);
- if(mpiece % PIECES == KNIGHT)
- glScalef(1.0+steps/100.0, 1.0, 1.0+steps/100.0);
+ if(cs->mpiece % PIECES == KNIGHT)
+ glScalef(1.0+cs->steps/100.0, 1.0, 1.0+cs->steps/100.0);
else
- glScalef(1.0, 1 - steps/50.0 > 0.01 ? 1 - steps/50.0 : 0.01, 1.0);
- glCallList(tpiece % 7);
+ glScalef(1.0, 1 - cs->steps/50.0 > 0.01 ? 1 - cs->steps/50.0 : 0.01, 1.0);
+ glCallList(cs->tpiece % 7);
+ mi->polygon_count += cs->poly_counts[cs->tpiece % PIECES];
- if(!wire)
+ if(!cs->wire)
glDisable(GL_BLEND);
}
/** draw board */
-void drawBoard(void) {
+static void drawBoard(ModeInfo *mi, Chesscreen *cs)
+{
int i, j;
glBegin(GL_QUADS);
for(i = 0; i < BOARDSIZE; ++i)
for(j = 0; j < BOARDSIZE; ++j) {
+ double ma1 = (i+j)%2 == 0 ? cs->mod*i : 0.0;
+ double mb1 = (i+j)%2 == 0 ? cs->mod*j : 0.0;
+ double ma2 = (i+j)%2 == 0 ? cs->mod*(i+1.0) : 0.01;
+ double mb2 = (i+j)%2 == 0 ? cs->mod*(j+1.0) : 0.01;
+
/*glColor3fv(colors[(i+j)%2]);*/
- glColor4f(colors[(i+j)%2][0], colors[(i+j)%2][1],
- colors[(i+j)%2][2], 0.8);
+ glColor4f(cs->colors[(i+j)%2][0], cs->colors[(i+j)%2][1],
+ cs->colors[(i+j)%2][2], 0.65);
+
glNormal3f(0.0, 1.0, 0.0);
+/* glTexCoord2f(mod*i, mod*(j+1.0)); */
+ glTexCoord2f(ma1, mb2);
glVertex3f(i, 0.0, j + 1.0);
+/* glTexCoord2f(mod*(i+1.0), mod*(j+1.0)); */
+ glTexCoord2f(ma2, mb2);
glVertex3f(i + 1.0, 0.0, j + 1.0);
+ glTexCoord2f(ma2, mb1);
+/* glTexCoord2f(mod*(i+1.0), mod*j); */
glVertex3f(i + 1.0, 0.0, j);
+ glTexCoord2f(ma1, mb1);
+/* glTexCoord2f(mod*i, mod*j); */
glVertex3f(i, 0.0, j);
+
+ mi->polygon_count++;
}
/* chop underneath board */
glEnd();
}
-double theta = 0.0;
+static void draw_pieces(ModeInfo *mi, Chesscreen *cs, int wire)
+{
+ if (!cs->wire) {
+ glEnable(GL_TEXTURE_2D);
+ glBindTexture(GL_TEXTURE_2D, cs->piecetexture);
+ glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
+
+ glColor4f(0.5, 0.5, 0.5, 1.0);
+ glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, MaterialShadow);
+ }
-void draw_pieces(void) {
- drawPieces();
- if(moving) drawMovingPiece();
- if(take) drawTakePiece();
+ drawPieces(mi, cs);
+ if(cs->moving) drawMovingPiece(mi, cs, 0);
+ if(cs->take) drawTakePiece(mi, cs, 0);
+ glDisable(GL_TEXTURE_2D);
+}
+
+static void draw_shadow_pieces(ModeInfo *mi, Chesscreen *cs, int wire)
+{
+ if (!cs->wire) {
+ glEnable(GL_TEXTURE_2D);
+ glBindTexture(GL_TEXTURE_2D, cs->piecetexture);
+ glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
+ }
+
+ /* use the stencil */
+ glDisable(GL_LIGHTING);
+ glDisable(GL_COLOR_MATERIAL);
+ glDisable(GL_DEPTH_TEST);
+ glDisable(GL_TEXTURE_2D);
+ glDisable(GL_BLEND);
+
+ glClear(GL_STENCIL_BUFFER_BIT);
+ glColorMask(0,0,0,0);
+ glEnable(GL_STENCIL_TEST);
+
+ glStencilFunc(GL_ALWAYS, 1, 0xFFFFFFFFL);
+ glStencilOp(GL_KEEP, GL_KEEP, GL_INCR);
+
+
+ glPushMatrix();
+ glTranslatef(0.0, 0.001, 0.0);
+
+ /* draw the pieces */
+ drawPiecesShadow(mi, cs);
+ if(cs->moving) drawMovingPiece(mi, cs, shadows);
+ if(cs->take) drawTakePiece(mi, cs, shadows);
+
+ glPopMatrix();
+
+
+ /* turn on drawing into colour buffer */
+ glColorMask(1,1,1,1);
+
+ /* programming with effect */
+ glDisable(GL_LIGHTING);
+ glDisable(GL_COLOR_MATERIAL);
+ glDisable(GL_TEXTURE_2D);
+
+ /* now draw the union of the shadows */
+
+ /*
+ <todo>
+ want to keep alpha values (alpha is involved in transition
+ effects of the active pieces).
+ </todo>
+ */
+ glStencilFunc(GL_NOTEQUAL, 0, 0xFFFFFFFFL);
+ glStencilOp(GL_KEEP, GL_KEEP, GL_REPLACE);
+
+ glEnable(GL_BLEND);
+
+ glColor4fv(MaterialShadow);
+
+ /* draw the board generously to fill the shadows */
+ glBegin(GL_QUADS);
+
+ glVertex3f(-1.0, 0.0, -1.0);
+ glVertex3f(-1.0, 0.0, BOARDSIZE + 1.0);
+ glVertex3f(1.0 + BOARDSIZE, 0.0, BOARDSIZE + 1.0);
+ glVertex3f(1.0 + BOARDSIZE, 0.0, -1.0);
+
+ glEnd();
+
+ glDisable(GL_STENCIL_TEST);
+
+ /* "pop" attributes */
+ glEnable(GL_TEXTURE_2D);
+ glEnable(GL_COLOR_MATERIAL);
+ glEnable(GL_LIGHTING);
+ glEnable(GL_CULL_FACE);
+
+
+
+}
+
+enum {X, Y, Z, W};
+enum {A, B, C, D};
+
+/* create a matrix that will project the desired shadow */
+static void shadowmatrix(GLfloat shadowMat[4][4],
+ GLfloat groundplane[4],
+ GLfloat lightpos[4])
+{
+ GLfloat dot;
+
+ /* find dot product between light position vector and ground plane normal */
+ dot = groundplane[X] * lightpos[X] +
+ groundplane[Y] * lightpos[Y] +
+ groundplane[Z] * lightpos[Z] +
+ groundplane[W] * lightpos[W];
+
+ shadowMat[0][0] = dot - lightpos[X] * groundplane[X];
+ shadowMat[1][0] = 0.f - lightpos[X] * groundplane[Y];
+ shadowMat[2][0] = 0.f - lightpos[X] * groundplane[Z];
+ shadowMat[3][0] = 0.f - lightpos[X] * groundplane[W];
+
+ shadowMat[X][1] = 0.f - lightpos[Y] * groundplane[X];
+ shadowMat[1][1] = dot - lightpos[Y] * groundplane[Y];
+ shadowMat[2][1] = 0.f - lightpos[Y] * groundplane[Z];
+ shadowMat[3][1] = 0.f - lightpos[Y] * groundplane[W];
+
+ shadowMat[X][2] = 0.f - lightpos[Z] * groundplane[X];
+ shadowMat[1][2] = 0.f - lightpos[Z] * groundplane[Y];
+ shadowMat[2][2] = dot - lightpos[Z] * groundplane[Z];
+ shadowMat[3][2] = 0.f - lightpos[Z] * groundplane[W];
+
+ shadowMat[X][3] = 0.f - lightpos[W] * groundplane[X];
+ shadowMat[1][3] = 0.f - lightpos[W] * groundplane[Y];
+ shadowMat[2][3] = 0.f - lightpos[W] * groundplane[Z];
+ shadowMat[3][3] = dot - lightpos[W] * groundplane[W];
}
/** reflectionboard */
-void draw_reflections(void) {
+static void draw_reflections(ModeInfo *mi, Chesscreen *cs)
+{
+ int i, j;
+
glEnable(GL_STENCIL_TEST);
glStencilFunc(GL_ALWAYS, 1, 1);
glStencilOp(GL_KEEP, GL_KEEP, GL_REPLACE);
glDisable(GL_DEPTH_TEST);
glBegin(GL_QUADS);
- glVertex3f(0, 0, BOARDSIZE);
- glVertex3f(0, 0, 0);
- glVertex3f(BOARDSIZE, 0, 0);
- glVertex3f(BOARDSIZE, 0, BOARDSIZE);
+
+ /* 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);
+ mi->polygon_count++;
+ }
+ }
glEnd();
glEnable(GL_DEPTH_TEST);
glPushMatrix();
glScalef(1.0, -1.0, 1.0);
glTranslatef(0.5, 0.0, 0.5);
-
- glLightfv(GL_LIGHT0, GL_POSITION, position);
- draw_pieces();
+
+ glLightfv(GL_LIGHT0, GL_POSITION, cs->position);
+ draw_pieces(mi, cs, cs->wire);
glPopMatrix();
glDisable(GL_STENCIL_TEST);
- glLightfv(GL_LIGHT0, GL_POSITION, position);
+ glLightfv(GL_LIGHT0, GL_POSITION, cs->position);
glEnable(GL_CULL_FACE);
glCullFace(GL_BACK);
}
/** draws the scene */
-void display(Chesscreen *c) {
+static void display(ModeInfo *mi, Chesscreen *cs)
+{
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT);
+ mi->polygon_count = 0;
+
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
- /** setup perspectif */
+ /** setup perspectiv */
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);
+ gltrackball_rotate (cs->trackball);
+ glRotatef(cs->theta*100, 0.0, 1.0, 0.0);
glTranslatef(-0.5*BOARDSIZE, 0.0, -0.5*BOARDSIZE);
+/* cs->position[0] = 4.0 + 1.0*-sin(cs->theta*100*M_PI/180.0); */
+/* cs->position[2] = 4.0 + 1.0* cos(cs->theta*100*M_PI/180.0); */
+/* cs->position[1] = 5.0; */
+
+ /* this is the lone light that the shadow matrix is generated from */
+ cs->position[0] = 1.0;
+ cs->position[2] = 1.0;
+ cs->position[1] = 16.0;
+
+ cs->position2[0] = 4.0 + 8.0*-sin(cs->theta*100*M_PI/180.0);
+ cs->position2[2] = 4.0 + 8.0* cos(cs->theta*100*M_PI/180.0);
+
+ if (!cs->wire) {
+ glEnable(GL_LIGHTING);
+ glLightfv(GL_LIGHT0, GL_POSITION, cs->position);
+ glLightfv(GL_LIGHT1, GL_POSITION, cs->position2);
+ glEnable(GL_LIGHT0);
+ }
+
/** draw board, pieces */
- if(!wire) {
+ if(!cs->wire) {
glEnable(GL_LIGHTING);
glEnable(GL_COLOR_MATERIAL);
- draw_reflections();
- glEnable(GL_BLEND);
- drawBoard();
- glDisable(GL_BLEND);
+
+ if(reflections && !cs->wire) {
+ draw_reflections(mi, cs);
+ glEnable(GL_BLEND);
+ }
+
+ glEnable(GL_TEXTURE_2D);
+ glBindTexture(GL_TEXTURE_2D, cs->boardtexture);
+ drawBoard(mi, cs);
+ glDisable(GL_TEXTURE_2D);
+
+ if(shadows) {
+ /* render shadows */
+ GLfloat m[4][4];
+ shadowmatrix(m, cs->ground, cs->position);
+
+ glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, MaterialShadow);
+ glEnable(GL_BLEND);
+ glDisable(GL_LIGHTING);
+ glDisable(GL_DEPTH_TEST);
+
+ /* display ant shadow */
+ glPushMatrix();
+ glTranslatef(0.0, 0.001, 0.0);
+ glMultMatrixf(m[0]);
+ glTranslatef(0.5, 0.01, 0.5);
+ draw_shadow_pieces(mi, cs, cs->wire);
+ glPopMatrix();
+
+ glEnable(GL_LIGHTING);
+ glDisable(GL_BLEND);
+ glEnable(GL_DEPTH_TEST);
+ }
+
+ if(reflections)
+ glDisable(GL_BLEND);
}
else
- drawBoard();
+ drawBoard(mi, cs);
- glTranslatef(0.5, .01, 0.5);
- draw_pieces();
+ glTranslatef(0.5, 0.0, 0.5);
+ draw_pieces(mi, cs, cs->wire);
- if(!wire) {
+ if(!cs->wire) {
glDisable(GL_COLOR_MATERIAL);
glDisable(GL_LIGHTING);
}
- if (!c->button_down_p)
- theta += .002;
+ if (!cs->button_down_p)
+ cs->theta += .002;
}
/** reshape handler */
-void reshape_chess(ModeInfo *mi, int width, int height) {
+ENTRYPOINT void reshape_chess(ModeInfo *mi, int width, int height)
+{
GLfloat h = (GLfloat) height / (GLfloat) width;
glViewport(0,0, width, height);
glMatrixMode(GL_PROJECTION);
}
/** initialization handler */
-void init_chess(ModeInfo *mi) {
- Chesscreen *c;
+ENTRYPOINT void init_chess(ModeInfo *mi)
+{
+ Chesscreen *cs;
int screen = MI_SCREEN(mi);
- wire = MI_IS_WIREFRAME(mi);
if(!qs &&
!(qs = (Chesscreen *) calloc(MI_NUM_SCREENS(mi), sizeof(Chesscreen))))
return;
- c = &qs[screen];
- c->window = MI_WINDOW(mi);
- c->trackball = gltrackball_init ();
+ cs = &qs[screen];
+ cs->window = MI_WINDOW(mi);
+ cs->wire = MI_IS_WIREFRAME(mi);
+ cs->trackball = gltrackball_init ();
- if((c->glx_context = init_GL(mi)))
+ cs->oldwhite = -1;
+
+ cs->colors[0][0] = 1.0;
+ cs->colors[0][1] = 0.5;
+ cs->colors[0][2] = 0.0;
+
+ cs->colors[1][0] = 0.6;
+ cs->colors[1][1] = 0.6;
+ cs->colors[1][2] = 0.6;
+
+ cs->done = 1;
+ cs->count = 99;
+ cs->mod = 1.4;
+
+/* cs->position[0] = 0.0; */
+/* cs->position[1] = 5.0; */
+/* cs->position[2] = 5.0; */
+/* cs->position[3] = 1.0; */
+
+ cs->position[0] = 0.0;
+ cs->position[1] = 24.0;
+ cs->position[2] = 2.0;
+ cs->position[3] = 1.0;
+
+
+ cs->position2[0] = 5.0;
+ cs->position2[1] = 5.0;
+ cs->position2[2] = 5.0;
+ cs->position2[3] = 1.0;
+
+ cs->ground[0] = 0.0;
+ cs->ground[1] = 1.0;
+ cs->ground[2] = 0.0;
+ cs->ground[3] = -0.00001;
+
+ cs->oldgame = -1;
+
+
+ if((cs->glx_context = init_GL(mi)))
reshape_chess(mi, MI_WIDTH(mi), MI_HEIGHT(mi));
else
MI_CLEARWINDOW(mi);
glClearColor(0.0, 0.0, 0.0, 0.0);
- glDepthFunc(GL_LEQUAL);
- glClearStencil(0);
- glEnable(GL_CULL_FACE);
- glCullFace(GL_BACK);
+ if (!cs->wire) {
+ glDepthFunc(GL_LEQUAL);
+ glClearStencil(0);
+ glEnable(GL_CULL_FACE);
+ glCullFace(GL_BACK);
- gen_model_lists();
+ make_piece_texture(cs);
+ make_board_texture(cs);
+ }
+ gen_model_lists( classic, cs->poly_counts);
- if (!wire) {
- setup_lights();
+ if(!cs->wire) {
+ setup_lights(cs);
glColorMaterial(GL_FRONT, GL_DIFFUSE);
- glShadeModel(GL_SMOOTH);
+ glShadeModel(smooth ? GL_SMOOTH : GL_FLAT);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
glEnable(GL_DEPTH_TEST);
}
else
- glPolygonMode(GL_FRONT, GL_LINE);
-
-/* buildBoard(); */
+ glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);
}
/** does dirty work drawing scene, moving pieces */
-void draw_chess(ModeInfo *mi) {
- Chesscreen *c = &qs[MI_SCREEN(mi)];
+ENTRYPOINT void draw_chess(ModeInfo *mi)
+{
+ Chesscreen *cs = &qs[MI_SCREEN(mi)];
Window w = MI_WINDOW(mi);
Display *disp = MI_DISPLAY(mi);
- if(!c->glx_context)
+ if(!cs->glx_context)
return;
- glXMakeCurrent(disp, w, *(c->glx_context));
+ glXMakeCurrent(disp, w, *(cs->glx_context));
/** code for moving a piece */
- if(moving && ++steps == 100) {
- moving = count = steps = take = 0;
- game.board[game.moves[mc][2]][game.moves[mc][3]] = mpiece;
- ++mc;
+ if(cs->moving && ++cs->steps == 100) {
+ cs->moving = cs->count = cs->steps = cs->take = 0;
+ cs->game.board[cs->game.moves[cs->mc][2]][cs->game.moves[cs->mc][3]] = cs->mpiece;
+ ++cs->mc;
- if(mc == game.movecount) {
- done = 1;
- mc = 0;
+ if(cs->mc == cs->game.movecount) {
+ cs->done = 1;
+ cs->mc = 0;
}
}
- if(done)
- glLightf(GL_LIGHT0, GL_CONSTANT_ATTENUATION,
- done == 1 ? 1.0+0.1*count : 99.0/count);
-
- if(++count == 100) {
- if(!done) {
- mpiece = game.board[game.moves[mc][0]][game.moves[mc][1]];
- game.board[game.moves[mc][0]][game.moves[mc][1]] = NONE;
+ if(++cs->count == 100) {
+ if(!cs->done) {
+ cs->mpiece = cs->game.board[cs->game.moves[cs->mc][0]][cs->game.moves[cs->mc][1]];
+ cs->game.board[cs->game.moves[cs->mc][0]][cs->game.moves[cs->mc][1]] = NONE;
- if((tpiece = game.board[game.moves[mc][2]][game.moves[mc][3]])) {
- game.board[game.moves[mc][2]][game.moves[mc][3]] = NONE;
- take = 1;
+ if((cs->tpiece = cs->game.board[cs->game.moves[cs->mc][2]][cs->game.moves[cs->mc][3]])) {
+ cs->game.board[cs->game.moves[cs->mc][2]][cs->game.moves[cs->mc][3]] = NONE;
+ cs->take = 1;
}
- from[0] = game.moves[mc][0];
- from[1] = game.moves[mc][1];
- to[0] = game.moves[mc][2];
- to[1] = game.moves[mc][3];
+ cs->from[0] = cs->game.moves[cs->mc][0];
+ cs->from[1] = cs->game.moves[cs->mc][1];
+ cs->to[0] = cs->game.moves[cs->mc][2];
+ cs->to[1] = cs->game.moves[cs->mc][3];
- dz = (to[0] - from[0]) / 100;
- dx = (to[1] - from[1]) / 100;
- steps = 0;
- moving = 1;
+ cs->dz = (cs->to[0] - cs->from[0]) / 100;
+ cs->dx = (cs->to[1] - cs->from[1]) / 100;
+ cs->steps = 0;
+ cs->moving = 1;
}
- else if(done == 1) {
- /* copy over new game */
- game = games[random()%GAMES];
- build_colors();
- done = 2;
- count = 0;
+ else if(cs->done == 1) {
+ int newgame = cs->oldgame;
+ while(newgame == cs->oldgame)
+ newgame = random()%GAMES;
+
+ /* mod the mod */
+ cs->mod = 0.6 + (random()%20)/10.0;
+
+ /* same old game */
+ cs->oldgame = newgame;
+ cs->game = games[cs->oldgame];
+ build_colors(cs);
+ cs->done = 2;
+ cs->count = 0;
}
else {
- done = 0;
- count = 0;
+ cs->done = 0;
+ cs->count = 0;
}
}
- display(c);
+ /* set lighting */
+ if(cs->done) {
+ glLightf(GL_LIGHT0, GL_CONSTANT_ATTENUATION,
+ cs->done == 1 ? 1.0+0.1*cs->count : 100.0/cs->count);
+ glLightf(GL_LIGHT1, GL_CONSTANT_ATTENUATION,
+ cs->done == 1 ? 1.0+0.1*cs->count : 100.0/cs->count);
+ glLightf(GL_LIGHT1, GL_LINEAR_ATTENUATION, 0.14);
+ glLightf(GL_LIGHT0, GL_LINEAR_ATTENUATION, 0.14);
+ }
+
+ display(mi, cs);
if(mi->fps_p) do_fps(mi);
glFinish();
}
/** bust it */
-void release_chess(ModeInfo *mi) {
+ENTRYPOINT void release_chess(ModeInfo *mi)
+{
if(qs)
free((void *) qs);
+ qs = 0;
- FreeAllGL(MI);
+ FreeAllGL(mi);
}
+XSCREENSAVER_MODULE_2 ("Endgame", endgame, chess)
+
#endif
projects / xscreensaver / blobdiff