1 /*
2 #
3 # File : tron.cpp
4 # ( C++ source file )
5 #
6 # Description : A clone of the famous (and very simple) Tron game.
7 # This file is a part of the CImg Library project.
8 # ( http://cimg.eu )
9 #
10 # Copyright : David Tschumperlé
11 # ( http://tschumperle.users.greyc.fr/ )
12 #
13 # License : CeCILL v2.0
14 # ( http://www.cecill.info/licences/Licence_CeCILL_V2-en.html )
15 #
16 # This software is governed by the CeCILL license under French law and
17 # abiding by the rules of distribution of free software. You can use,
18 # modify and/ or redistribute the software under the terms of the CeCILL
19 # license as circulated by CEA, CNRS and INRIA at the following URL
20 # "http://www.cecill.info".
21 #
22 # As a counterpart to the access to the source code and rights to copy,
23 # modify and redistribute granted by the license, users are provided only
24 # with a limited warranty and the software's author, the holder of the
25 # economic rights, and the successive licensors have only limited
26 # liability.
27 #
28 # In this respect, the user's attention is drawn to the risks associated
29 # with loading, using, modifying and/or developing or reproducing the
30 # software by the user in light of its specific status of free software,
31 # that may mean that it is complicated to manipulate, and that also
32 # therefore means that it is reserved for developers and experienced
33 # professionals having in-depth computer knowledge. Users are therefore
34 # encouraged to load and test the software's suitability as regards their
35 # requirements in conditions enabling the security of their systems and/or
36 # data to be ensured and, more generally, to use and operate it in the
37 # same conditions as regards security.
38 #
39 # The fact that you are presently reading this means that you have had
40 # knowledge of the CeCILL license and that you accept its terms.
41 #
42 */
43
44 #include "CImg.h"
45 using namespace cimg_library;
46
47 // Main procedure
48 //----------------
main(int argc,char ** argv)49 int main(int argc, char **argv) {
50
51 // Print usage, help and retrieve command line options
52 //-----------------------------------------------------
53 cimg_usage("A very simple Tron game, using the CImg Library");
54 cimg_help("--- Quick help ----------------------------\n"
55 " Player 1 (blue) :\n"
56 " Use keys 'Z' (up), 'S' (down), 'Q' (left)\n"
57 " and 'D' (right) to control your player.\n"
58 " Right 'CONTROL' key enables turbospeed\n"
59 " Player 2 (red) : \n"
60 " Use arrow keys to control your player.\n"
61 " 'TAB' key enables turbospeed.\n"
62 "-------------------------------------------");
63
64 const char *geom = cimg_option("-g","300x300","Size of the game board");
65 const int delay = cimg_option("-s",10,"Game speed (lower value means faster)");
66 const bool twoplayers = !cimg_option("-1",false,"One player only");
67 const int zoom = cimg_option("-z",1,"Zoom factor");
68 const bool full = cimg_option("-f",false,"Fullscreen mode");
69 unsigned int W = 400, H = 400;
70 std::sscanf(geom,"%u%*c%u",&W,&H);
71
72 // Define game colors and variables
73 //----------------------------------
74 const unsigned char blue[] = { 128,200,255}, red[] = { 255,0,0 }, white[] = { 255,255,255 };
75 int score1 = 0, score2 = 0, round_over = 0, ix1 = -1, iy1 = -1, x1 = 0, y1 = 0, u1 = 0, v1 = 0,
76 ix2 = -1, iy2 = -1, x2 = 0, y2 = 0, u2 = 0, v2 = 0;
77 bool start_round = true, turbo1 = false, turbo2 = false;
78
79 // Create background image
80 //--------------------------
81 CImg<unsigned char> background, img;
82 background.assign(64,64,1,3,0).noise(60).draw_plasma().resize(W,H).blur(2).normalize(0,128).
83 draw_rectangle(0,0,W-1,H-1,white,1.0f,~0U);
84
85 // Open display window
86 //---------------------
87 CImgDisplay disp(background,"* CImg-Tron *");
88 if (zoom>1) disp.resize(-100*zoom,-100*zoom);
89 if (full) disp.toggle_fullscreen().display(background);
90
91 // Start main game loop
92 //----------------------
93 while (!disp.is_closed() && !disp.is_keyESC()) {
94
95 // Init new game round if necessary
96 //----------------------------------
97 if (start_round) {
98
99 // Init game variables
100 round_over = 0;
101 ix1 = -1; iy1 = -1; x1 = 10; y1 = 10; u1 = 1; v1 = 0; turbo1 = false;
102 ix2 = -1; iy2 = -1; x2 = W - 11; y2 = H - 11; u2 = -1; v2 = 0; turbo2 = false;
103 img = background;
104 start_round = false;
105
106 // Display a simple pre-round page
107 CImg<unsigned char> logo, pressakey;
108 logo.draw_text(0,0," CImg-Tron ",white,0,1,33).resize(-100,-100,1,3);
109 CImg<unsigned char> tmp = (+background).draw_image((W - logo.width())/2,(H - logo.height())/2 - 20,
110 logo,logo.get_channel(0).dilate(6).normalize(0,1)).
111 draw_text(W/2 - 60,H/2 + 10,"Blue ( %u )",blue,0,1,13,score1).
112 draw_text(W/2 + 10,H/2 + 10,"Red ( %u )",red,0,1,13,score2);
113 pressakey.draw_text(0,0,"* Press a key to start round *",white);
114 for (float i = 0; i<1; i+=0.05f) ((+tmp)*=i).display(disp.wait(20));
115 disp.flush();
116 for (unsigned long t = 0; !disp.key() && !disp.is_closed(); ++t) {
117 if (!(t%10)) { if (t%20) disp.display(tmp);
118 else disp.display((+tmp).draw_image(W/2 - 70,H/2 + 50,pressakey,pressakey,1,255)); }
119 if (disp.wait(20).is_resized()) disp.resize(disp);
120 }
121 if (disp.is_keyESC()) disp.flush();
122 }
123
124 // Test collision between players and borders
125 if (x1<0 || x1>=img.width() || y1<0 || y1>=img.height() ||
126 img(x1,y1,0)!=background(x1,y1,0) ||
127 img(x1,y1,1)!=background(x1,y1,1) ||
128 img(x1,y1,2)!=background(x1,y1,2) ||
129 ((ix1>=0 || iy1>=0) && (img(ix1,iy1,0)!=background(ix1,iy1,0) || // Collision test for turbo mode
130 img(ix1,iy1,1)!=background(ix1,iy1,1) ||
131 img(ix1,iy1,2)!=background(ix1,iy1,2)))) { round_over=1; score2++; }
132 if (twoplayers) {
133 if (x2<0 || x2>=img.width() || y2<0 || y2>=img.height() ||
134 img(x2,y2,0)!=background(x2,y2,0) ||
135 img(x2,y2,1)!=background(x2,y2,1) ||
136 img(x2,y2,2)!=background(x2,y2,2) ||
137 ((ix2>=0 || iy2>=0) && (img(ix2,iy2,0)!=background(ix2,iy2,0) || // Collision test for turbo mode
138 img(ix2,iy2,1)!=background(ix2,iy2,1) ||
139 img(ix2,iy2,2)!=background(ix2,iy2,2)))) { round_over=2; score1++; }
140 }
141
142 // Draw new players positions
143 img.draw_point(x1,y1,blue);
144 if (ix1>=0 && iy1>=0) img.draw_point(ix1,iy1,blue);
145 if (twoplayers) {
146 img.draw_point(x2,y2,red);
147 if (ix2>=0 && iy2>=0) img.draw_point(ix2,iy2,red);
148 }
149 if (disp.is_resized()) disp.resize(disp);
150 img.display(disp);
151
152 // Update players positions
153 x1+=u1; y1+=v1;
154 if (turbo1) { ix1 = x1; iy1 = y1; x1+=u1; y1+=v1; } else { ix1 = iy1 = -1; }
155 if (twoplayers) {
156 x2+=u2; y2+=v2;
157 if (turbo2) { ix2 = x2; iy2 = y2; x2+=u2; y2+=v2; } else { ix2 = iy2 = -1; }
158 }
159
160 // Test keyboard events
161 int nu1 = u1, nv1 = v1, nu2 = u2, nv2 = v2;
162 if (disp.is_keyARROWLEFT()) { nu1 = -1; nv1 = 0; }
163 if (disp.is_keyARROWRIGHT()) { nu1 = 1; nv1 = 0; }
164 if (disp.is_keyARROWUP()) { nu1 = 0; nv1 = -1; }
165 if (disp.is_keyARROWDOWN()) { nu1 = 0; nv1 = 1; }
166 turbo1 = disp.is_keyCTRLRIGHT();
167 if (twoplayers) {
168 if (disp.is_keyQ()) { nu2 = -1; nv2 = 0; }
169 if (disp.is_keyD()) { nu2 = 1; nv2 = 0; }
170 if (disp.is_keyZ()) { nu2 = 0; nv2 = -1; }
171 if (disp.is_keyS()) { nu2 = 0; nv2 = 1; }
172 turbo2 = disp.is_keyTAB();
173 }
174 if (nu1!=-u1 && nv1!=-v1) { u1 = nu1; v1 = nv1; }
175 if (nu2!=-u2 && nv2!=-v2) { u2 = nu2; v2 = nv2; }
176
177 // Check if round is over.
178 if (round_over) {
179 const int xc = round_over==1?x1:x2, yc = round_over==1?y1:y2;
180 for (int r=0; r<50; r+=3) img.draw_circle(xc,yc,r,round_over==1?blue:red,r/300.0f).display(disp.wait(20));
181 for (int rr=0; rr<50; rr+=3)
182 ((+img)*=(50 - rr)/50.0f).draw_circle(xc,yc,(50 + rr),round_over==1?blue:red,1/6.0f).display(disp.wait(20));
183 start_round = true;
184 }
185
186 // Wait a small amount of time
187 disp.wait(delay);
188 }
189 return 0;
190 }
191