... Print PROGRAMS\Final Project final\planes\planeshoot.c 1

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1 ... Print PROGRAMS\Final Project final\planes\planeshoot.c 1 1 #include <GL/glut.h> 2 #include <math.h> 3 #include <GL/freeglut.h> 4 #include <GL/freeglut_ext.h> 5 #include <GL/freeglut_std.h> 6 #include <stdio.h> 7 8 int spot=0; 9 int location=0; 10 int time=0; 11 double h=0.4; int state=0; 14 int e1=0; 15 int e2=0; 16 int shoot=0; 17 double planeb1=16; 18 double planeb2=19; 19 double us=7.5; 20 double target=7.5;//7.5 or 5 21 double treestump=14; 22 double treeleaves=13; 23 double treestump2=25; 24 double treeleaves2=24; 25 double cl=21; 26 double cl2=30; 27 double rx=6; 28 double ry=8; #include <GL/gl.h> 31 #include <GL/glu.h> 32 #include <stdlib.h> #define DEFAULT_WIDTH #define DEFAULT_HEIGHT int width = DEFAULT_WIDTH; 38 int height = DEFAULT_HEIGHT; typedef GLubyte Pixel[3]; /*represents red green blue*/ int Width, Height; /*of image*/ /*array of pixels*/ 45 Pixel *Image; /*name of image file*/ 48 char *Filename = "./planeg.ppm"; 49 char *Filename1 = "./planeb.ppm"; 50 char *Filename2 = "./bark.ppm"; 51 char *Filename3 = "./leaves.ppm"; 52 char *Filename4 = "./explosion.ppm";

2 ... Print PROGRAMS\Final Project final\planes\planeshoot.c 2 53 char *Filename5 = "./rocket.ppm"; 54 char *Filename6 = "./go.ppm"; 55 char *Filename7 = "./cloud.ppm"; int allowedsize(int x)/*returns max power of 2 <= x*/ 58 { 59 int r;r = 1; 60 while(r < x) r=(r<<1); if(r==x) return r; 63 else return r>>1; /*reads image file assumes ppm format*/ 66 void readimage(int p){ 67 int w,h,max;int i,j; 68 unsigned int r,g,b,al; 69 int k;char ch;file *fp; if(p==0){fp = fopen(filename,"r"); 72 if(p==1){fp = fopen(filename1,"r"); 73 if(p==2){fp = fopen(filename2,"r"); 74 if(p==3){fp = fopen(filename3,"r"); 75 if(p==4){fp = fopen(filename4,"r"); 76 if(p==5){fp = fopen(filename5,"r"); 77 if(p==6){fp = fopen(filename6,"r"); 78 if(p==7){fp = fopen(filename7,"r"); /*read the header*/ 82 fscanf(fp, "P%c\n", &ch); 83 if (ch!= '3') { 84 fprintf(stderr, "Only ascii mode 3 channel PPM files"); 85 exit( 1); /*strip comment lines*/ 89 ch = getc(fp); 90 while (ch == '#') { 91 do { 92 ch = getc(fp); while (ch!= '\n'); 95 ch = getc(fp); ungetc(ch, fp); /*read the width*/ 100 fscanf(fp,"%d",&w); 101 /*read the height*/ 102 fscanf(fp,"%d",&h); 103 /*max intensity not used here*/ 104 fscanf(fp,"%d",&max);

3 ... Print PROGRAMS\Final Project final\planes\planeshoot.c /*width and height must be powers of 2 here of finding the max power of 2 <= w and h*/ Width = allowedsize(w); Height = allowedsize(h); //printf("width = %d, Height = %d\n",width,height); Image = (Pixel *)malloc(width*height*sizeof(pixel)); for(i=0;i<height;++i){ for(j=0;j<width;++j) { fscanf(fp,"%d %d %d",&r,&g,&b); k = i*width+j; (*(Image+k))[0] = (GLubyte)r; (*(Image+k))[1] = (GLubyte)g; (*(Image+k))[2] = (GLubyte)b; (*(Image+k))[3] = (GLubyte)al; /*better scan to the end of the row*/ for(j=width; j<w; ++j) fscanf(fp,"%c %c %c",&r,&g,&b); fclose(fp); void initialisetextures(int p){ GLint level = 0;/*only one level no level of detail*/ GLint components = 3; /*R,G,B components only*/ GLint border = 0; /*no border around the image*/ /*read the given image file*/ readimage(p); /*each pixelrow on a byte alignment boundary*/ glpixelstorei(gl_unpack_alignment,1); /*define information about the image*/ glteximage2d(gl_texture_2d,level,components, (GLsizei)Width, (GLsizei)Height, border, GL_RGB, GL_UNSIGNED_BYTE,Image); /*ensures that image is not wrapped*/ gltexparameteri (GL_TEXTURE_2D,GL_TEXTURE_WRAP_S,GL_CLAMP); gltexparameteri (GL_TEXTURE_2D,GL_TEXTURE_WRAP_T,GL_CLAMP); /*chooses mapping type from texels to pixels*/ gltexparameterf (GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_LINEAR); gltexparameterf (GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,GL_LINEAR); /*GL_LINEAR which performs a linear interpolation on the 4 surrounding texels*/ /*GL_DECAL overwrite pixel with texture colour*/ gltexenvf(gl_texture_env,gl_texture_env_mode,gl_decal); /*alternative is GL_MODULATE. modulates the lighting

4 ... Print PROGRAMS\Final Project final\planes\planeshoot.c by the texel value by multiplication*/ void init(){ 157 glclearcolor(1.0,1.0,1.0,0.0); 158 glmatrixmode(gl_projection); 159 glloadidentity(); 160 gluortho2d(0.0,20.0,0.0,13.0); 161 srand((unsigned) 500); void planeg(){//our plane 165 initialisetextures(0); 166 glenable(gl_texture_2d); 167 glcolor3f(1.0,0.0,0.0); gltexcoord2f(1,1);glvertex2f(0.3,us); 170 gltexcoord2f(1,0);glvertex2f(0.3,us+2); 171 gltexcoord2f(0,0);glvertex2f(4.0,us+2); 172 gltexcoord2f(0,1);glvertex2f(4.0,us); 173 glend(); gldisable(gl_texture_2d); void planebad1(){//enemy plane if(e1==0){initialisetextures(1); 180 else{initialisetextures(4); 181 glenable(gl_texture_2d); 182 glcolor3f(1.0,0.0,0.0); gltexcoord2f(0,0);glvertex2f(planeb1,7.5); 185 gltexcoord2f(0,1);glvertex2f(planeb1,9.5); 186 gltexcoord2f(1,1);glvertex2f(planeb1+3,9.5); 187 gltexcoord2f(1,0);glvertex2f(planeb1+3,7.5); 188 glend(); gldisable(gl_texture_2d); void planebad2(){//enemy plane if(e2==0){initialisetextures(1); 195 else{initialisetextures(4); 196 glenable(gl_texture_2d); 197 glcolor3f(1.0,0.0,0.0); gltexcoord2f(0,0);glvertex2f(planeb2,5.0); 200 gltexcoord2f(0,1);glvertex2f(planeb2,7.0); 201 gltexcoord2f(1,1);glvertex2f(planeb2+3,7.0); 202 gltexcoord2f(1,0);glvertex2f(planeb2+3,5.0); 203 glend(); 204

5 ... Print PROGRAMS\Final Project final\planes\planeshoot.c gldisable(gl_texture_2d); void rocket(){ initialisetextures(5); glenable(gl_texture_2d); if(shoot==1){ gltexcoord2f(0,0);glvertex2f(rx 2,ry); gltexcoord2f(0,1);glvertex2f(rx 2,ry+1); gltexcoord2f(1,1);glvertex2f(rx,ry+1); gltexcoord2f(1,0);glvertex2f(rx,ry); glend(); else{ rx= 1; gltexcoord2f(0,0);glvertex2f(rx 1, 1); gltexcoord2f(0,1);glvertex2f(rx 1, 1); gltexcoord2f(1,1);glvertex2f(rx, 1); gltexcoord2f(1,0);glvertex2f(rx, 1); glend(); gldisable(gl_texture_2d); void ground(){ glcolor3f(0.0,0.3,0.0); glvertex2f(0,0.0); glvertex2f(0,1.0); glvertex2f(20.0,1.0); glvertex2f(20.0,0.0); glend(); void tree(){ initialisetextures(2); glenable(gl_texture_2d); gltexcoord2f(0,0);glvertex2f(treestump,1.0); gltexcoord2f(0,1);glvertex2f(treestump,1.5); gltexcoord2f(1,1);glvertex2f(treestump+1.0,1.5); gltexcoord2f(1,0);glvertex2f(treestump+1,1.0); glend(); initialisetextures(3); gltexcoord2f(0,0);glvertex2f(treeleaves,1.5); gltexcoord2f(0.5,1);glvertex2f(treeleaves+1.5,4.0); gltexcoord2f(1,0);glvertex2f(treeleaves+3,1.5);

6 ... Print PROGRAMS\Final Project final\planes\planeshoot.c glend(); 258 gldisable(gl_texture_2d); void tree2(){ 262 initialisetextures(2); 263 glenable(gl_texture_2d); gltexcoord2f(0,0);glvertex2f(treestump2,1.0); 267 gltexcoord2f(0,1);glvertex2f(treestump2,1.5); 268 gltexcoord2f(1,1);glvertex2f(treestump2+1.0,1.5); 269 gltexcoord2f(1,0);glvertex2f(treestump2+1,1.0); 270 glend(); initialisetextures(3); gltexcoord2f(0,0);glvertex2f(treeleaves2,1.5); 275 gltexcoord2f(0.5,1);glvertex2f(treeleaves2+1.5,4.0); 276 gltexcoord2f(1,0);glvertex2f(treeleaves2+3,1.5); 277 glend(); 278 gldisable(gl_texture_2d); void cloud(){ 282 initialisetextures(7); 283 glenable(gl_texture_2d); 284 glcolor3f(1.0,0.0,0.0); gltexcoord2f(1,1);glvertex2f(cl,11.0); 287 gltexcoord2f(1,0);glvertex2f(cl,12.0); 288 gltexcoord2f(0,0);glvertex2f(cl+3,12.0); 289 gltexcoord2f(0,1);glvertex2f(cl+3,11.0); 290 glend(); 291 gldisable(gl_texture_2d); void cloud2(){ 295 initialisetextures(7); 296 glenable(gl_texture_2d); 297 glcolor3f(1.0,0.0,0.0); gltexcoord2f(1,1);glvertex2f(cl2,11.0); 300 gltexcoord2f(1,0);glvertex2f(cl2,12.0); 301 gltexcoord2f(0,0);glvertex2f(cl2+3,12.0); 302 gltexcoord2f(0,1);glvertex2f(cl2+3,11.0); 303 glend(); 304 gldisable(gl_texture_2d); void sun(){ 308 glcolor3f(1.0,1.0,0.0);

7 ... Print PROGRAMS\Final Project final\planes\planeshoot.c glvertex2f( 2,10.0); 311 glvertex2f( 2,14.0); 312 glvertex2f(3,14.0); 313 glvertex2f(1,11.0); 314 glend(); void gameover(){ 318 initialisetextures(6); 319 glenable(gl_texture_2d); 320 glcolor3f(1.0,0.0,0.0); gltexcoord2f(0,0);glvertex2f(1,1.0); 323 gltexcoord2f(0,1);glvertex2f(1,14.0); 324 gltexcoord2f(1,1);glvertex2f(19,14.0); 325 gltexcoord2f(1,0);glvertex2f(19,1.0); 326 glend(); 327 gldisable(gl_texture_2d); void display(){ 331 glclear(gl_color_buffer_bit); planeg(); 334 planebad1(); 335 planebad2(); 336 rocket(); 337 cloud(); 338 cloud2(); 339 sun(); 340 tree(); 341 tree2(); 342 ground(); 343 if(state==1){gameover(); 344 glflush(); void mouseclick(int button,int state,int x,int y){ 348 if(button == GLUT_LEFT_BUTTON && state == GLUT_DOWN){ 349 if(target==7.5){ 350 shoot=1; 351 rx=6; 352 ry=8; if(target==5){ 356 shoot=1; 357 rx=6; 358 ry=5.5;

8 ... Print PROGRAMS\Final Project final\planes\planeshoot.c glutpostredisplay(); void Keyboard(unsigned char k, int x, int y){ 365 if(k == 'w'){//near side tables 366 target=7.5; else if(k =='s'){ 369 target=5; glutpostredisplay(); void idle(){//handle animations 377 //time++; if(state==0){ 380 //move plane to where it should be 381 if(us>target){us =.3; 382 if(us<target){us+=.3; //move necessary objects 385 if(e1==0){planeb1=planeb1.1; 386 else{e1++; 387 if(e2==0){planeb2=planeb2.1; 388 else{e2++; 389 treestump =.2; 390 treeleaves =.2; 391 treestump2 =.2; 392 treeleaves2 =.2; 393 rx=rx+.3; 394 cl=cl.1; 395 cl2=cl2.1; if(rx>planeb1 && ry>6){shoot=0;e1=1; 398 if(rx>planeb2 && ry<6){shoot=0;e2=2; 399 if(planeb1 < 4.0){state=1; 400 if(planeb2 < 4.0){state=1; 401 if(cl< 4){cl=21.0; 402 if(cl2< 4){cl2=21.0; 403 if(treeleaves< 2){ 404 treeleaves=21; 405 treestump=22; if(treeleaves2< 2){ 408 treeleaves2=21; 409 treestump2=22; if(e1>10){e1=0; planeb1=20; 412 if(e2>10){e2=0; planeb2=20;

9 ... Print PROGRAMS\Final Project final\planes\planeshoot.c //end state glutpostredisplay(); int main(int argc, char** argv){ 420 glutinit(&argc, argv); 421 glutinitdisplaymode(glut_rgb GLUT_SINGLE); 422 glutinitwindowsize(400,400); 423 glutcreatewindow("planeshooter"); 424 glutdisplayfunc(display); 425 glutmousefunc(mouseclick); 426 glutidlefunc(idle); 427 glutkeyboardfunc(keyboard); 428 init(); 429 glutmainloop();

Lecture 3. Understanding of OPenGL programming

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