first commit
This commit is contained in:
662
CS4451/proj3/main.cpp
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662
CS4451/proj3/main.cpp
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@@ -0,0 +1,662 @@
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//C Stuff
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#include <stdio.h>
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#include <stdlib.h>
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#include <assert.h>
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#include <math.h>
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#include <time.h>
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//OpenGL Stuff
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#include <GL/glut.h>
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#define VPD_MIN 200
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#define VPD_DEFAULT 800
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#define VPD_MAX 1024
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#define ORTHO_SIZE 1.0
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#ifndef M_PI
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#define M_PI 3.14159265358979323846
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#endif
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#define TWOPI (2.0 * M_PI)
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/*
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* For some godforsaken reason, rand() is returning negative numbers in
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* FreeBSD and Linux.
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*
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* Hence this.
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*/
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inline float RANDNUM() {
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float f = (float)( (float)rand() / (float)(RAND_MAX+1) );
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if (f < 0) {
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return -1.*f;
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}
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return f;
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}
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enum MENU { MENU_LINES=0,
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MENU_TRIANGLES,
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MENU_SPRAY_MORE_POINTS,
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MENU_RESET,
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MENU_RANDOMIZE,
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MENU_ANIMATE,
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MENU_DRAWSITES,
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MENU_SITECOLORBLACK,
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MENU_INCREASE_SITE_SIZE,
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MENU_DECREASE_SITE_SIZE,
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MENU_DRAWING,
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MENU_UNCAP_FPS,
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MENU_RESET_FPS,
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MENU_DECREASE_MAX_FPS
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};
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typedef struct SRGB {
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float r;
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float g;
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float b;
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} RGB;
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typedef struct SSite {
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RGB color;
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float x;
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float y;
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float angle;
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float angularVelocity;
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float radius;
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} Site;
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typedef struct _rgb {
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unsigned char r,g,b;
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} ppm_rgb;
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typedef struct _ppmimage {
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int sizex,sizey;
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ppm_rgb *color;
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} ppmimage;
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//////////////////
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// Global STUFF //
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//////////////////
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#define DEFAULT_NUMPOINTS 64
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#define DEFAULT_RANDSITES 32
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#define DEFAULT_SITEWIDTH ORTHO_SIZE*.0025
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#define DEFAULT_FPS .00825;
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GLint wid; // GLUT window id
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GLint vpd = VPD_DEFAULT; // (square) viewport dimensions
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GLuint cone; //Cone display list
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GLuint numPoints = DEFAULT_NUMPOINTS; //number of points for the cone fan
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GLuint randSites = DEFAULT_RANDSITES; //The number of random points to draw from
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bool animate = false; //whether the world is animated or not
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bool drawSites = true; //whether or not to draw sites
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bool siteColorBlack = true; //defines whether sites will be drawn as black or not
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float siteWidth = DEFAULT_SITEWIDTH; //siteWidth for the rectangle
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bool useFile = false; //Use the ppm file or not
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ppmimage* pImage = NULL;
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bool capFPS = true;
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float ONE_OVER_FPS = DEFAULT_FPS; //fps cap
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Site* sites = NULL;
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/************************************************************/
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ppmimage read_ppmimage ( const char *name )
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{
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ppmimage result;
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int range;
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FILE *fp = fopen(name,"rb");
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if (!fp)
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{
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fprintf(stderr,"No file\n");
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exit(1);
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}
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if (getc(fp)!='P' || getc(fp)!='6') {
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fprintf(stderr,"Invalid File\n");
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exit(1);
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}
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fscanf(fp,"%d%d%d\n",&result.sizex,&result.sizey,&range);
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assert(range==255); // we'll use only rgb range 0...255 here
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result.color = (ppm_rgb*)malloc(result.sizex*result.sizey*sizeof(ppm_rgb));
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fread(result.color,sizeof(ppm_rgb),result.sizex*result.sizey,fp);
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return result;
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}
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ppm_rgb getRGB(float x, float y) {
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int newX, newY;
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x+=ORTHO_SIZE;
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y+=ORTHO_SIZE;
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x /= ORTHO_SIZE*2.;
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y /= ORTHO_SIZE*2.;
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y = 1.-y;
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//printf("x= %f y= %f\n",x,y);
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newX = (int)((x*pImage->sizex)-1.);
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newY = (int)((y*pImage->sizey)-1.);
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if (newX > pImage->sizex-1) {
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newX = pImage->sizex-1;
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} else if (newX < 0) {
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newX = 0;
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}
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if (newY > pImage->sizey-1) {
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newY = pImage->sizey-1;
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} else if (newY < 0) {
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newY = 0;
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}
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//printf("X= %d Y= %d sizex=%d\n",newX,newY,pImage->sizex);
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ppm_rgb p = pImage->color[(newY*pImage->sizex) + newX];
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//printf("%d\n",(newY*pImage->sizex) + newX);
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return pImage->color[(newY*pImage->sizex) + newX];
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}
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/*************************************************************/
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/*
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* Sites will never be NULL when this is called
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*/
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inline void reinit_sites() {
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free(sites);
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sites = (Site*)malloc(sizeof(Site)*randSites);
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}
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/*
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*
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*/
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GLvoid set_random_color(Site* s) {
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s->color.r = RANDNUM();
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s->color.g = RANDNUM();
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s->color.b = RANDNUM();
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}
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/*
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*
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*/
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GLvoid set_all_random_color() {
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for (GLuint i = 0; i < randSites; i++) {
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set_random_color(sites+i);
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}
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}
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/*
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*
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*/
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GLvoid init_random_sites(int start) {
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float x, y;
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for (GLuint i = start; i < randSites; i++) {
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x = RANDNUM() * ORTHO_SIZE * 2.;
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y = RANDNUM() * ORTHO_SIZE * 2.;
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x -= ORTHO_SIZE;
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y -= ORTHO_SIZE;
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sites[i].x = x;
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sites[i].y = y;
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sites[i].radius = sqrt(pow(x,2)+pow(y,2));
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/* Add by quadrant for ease */
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if ( x >= 0. && y >= 0.) {
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//Quadrant 1
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sites[i].angle = atan(y/x);
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} else if ( x < 0. && y >= 0. ) {
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//Quad 2
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sites[i].angle = atan(y/-x) + (M_PI/2.);
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} else if ( x < 0. && y < 0. ) {
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//Quad 3
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sites[i].angle = atan(-y/-x) + M_PI;
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} else {
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//Quad 4
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sites[i].angle = atan(-y/x) + (M_PI) + (M_PI/2.);
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}
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set_random_color(sites+i);
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sites[i].angularVelocity = RANDNUM() * (4.) * ((rand() % 2) ? -1. : 1.);
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//convert to radians
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sites[i].angularVelocity /= (180./M_PI);
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}
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}
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GLvoid init_random_sites() {
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init_random_sites(0);
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}
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/**
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* This performs window resizing, like project 2
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*/
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GLvoid window_resize(GLint vpw, GLint vph)
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{
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glutSetWindow(wid);
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/* maintain a square viewport, not too small, not too big */
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if( vpw < vph ) vpd = vph;
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else vpd = vpw;
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if( vpd < VPD_MIN ) vpd = VPD_MIN;
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if( vpd > VPD_MAX ) vpd = VPD_MAX;
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glViewport(0, 0, vpd, vpd);
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glutReshapeWindow(vpd, vpd);
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glutPostRedisplay();
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}
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/**
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* Window menu
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*/
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GLvoid menu ( int value ) {
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switch (value) {
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case MENU_LINES:
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glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);
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glutPostRedisplay();
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break;
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case MENU_TRIANGLES:
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glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
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glutPostRedisplay();
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break;
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case MENU_SPRAY_MORE_POINTS:
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randSites *= 2;
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sites = (Site*)realloc(sites,sizeof(Site)*randSites);
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init_random_sites(randSites/2);
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glutPostRedisplay();
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break;
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case MENU_RESET:
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animate = false;
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siteColorBlack = true;
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drawSites = true;
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useFile = false;
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siteWidth = DEFAULT_SITEWIDTH;
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//Avoid constantly rerandomizing
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if (randSites == DEFAULT_RANDSITES) {
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glutPostRedisplay();
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break;
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}
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case MENU_RANDOMIZE:
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useFile = false;
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animate = false;
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siteColorBlack = true;
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drawSites = true;
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randSites = DEFAULT_RANDSITES;
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reinit_sites();
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init_random_sites();
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glutPostRedisplay();
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break;
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case MENU_ANIMATE:
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animate ? animate = false : animate = true;
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glutPostRedisplay();
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break;
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case MENU_DRAWSITES:
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drawSites ? drawSites = false : drawSites = true;
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glutPostRedisplay();
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break;
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case MENU_SITECOLORBLACK:
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siteColorBlack ? siteColorBlack = false : siteColorBlack = true;
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glutPostRedisplay();
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break;
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case MENU_INCREASE_SITE_SIZE:
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siteWidth *= 2;
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glutPostRedisplay();
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break;
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case MENU_DECREASE_SITE_SIZE:
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siteWidth /= 2;
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glutPostRedisplay();
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break;
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case MENU_DRAWING:
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useFile ? useFile = false : useFile = true;
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glutPostRedisplay();
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break;
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case MENU_UNCAP_FPS:
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capFPS ? capFPS = false : capFPS = true;
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break;
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case MENU_RESET_FPS:
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ONE_OVER_FPS = DEFAULT_FPS;
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break;
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case MENU_DECREASE_MAX_FPS:
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ONE_OVER_FPS *= 2.;
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break;
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default: break;
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}
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}
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/**
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* Keyboard input callback
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*/
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GLvoid keyboard_event(GLubyte key, GLint x, GLint y)
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{
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switch(key) {
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case 27: /* ESC */
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exit(0);
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case 'l':
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menu(MENU_LINES);
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break;
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case 'f':
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menu(MENU_TRIANGLES);
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break;
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case 's':
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menu(MENU_SPRAY_MORE_POINTS);
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break;
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case 'r':
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menu(MENU_RESET);
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break;
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case 'e':
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menu(MENU_RANDOMIZE);
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break;
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case 'a':
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menu(MENU_ANIMATE);
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break;
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case 'd':
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menu(MENU_DRAWSITES);
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break;
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case 'i':
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menu(MENU_SITECOLORBLACK);
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break;
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case '+':
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menu(MENU_INCREASE_SITE_SIZE);
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break;
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case '-':
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menu(MENU_DECREASE_SITE_SIZE);
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break;
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case 't':
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menu(MENU_DRAWING);
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break;
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case 'u':
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menu(MENU_UNCAP_FPS);
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break;
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case 'j':
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menu(MENU_RESET_FPS);
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break;
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case 'k':
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menu(MENU_DECREASE_MAX_FPS);
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break;
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default: break;
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}
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}
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/**
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* Handle mouse drag motion
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*/
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GLvoid button_motion(GLint mx, GLint my) {
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//printf("Dragging %d %d\n",mx,my);
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return;
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}
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/**
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* Handle mouse movement
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*/
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GLvoid passive_motion(GLint mx, GLint my) {
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//printf("Someone is moving above me %d %d\n",mx,my);
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return;
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}
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/**
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* Redraw the view
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*/
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GLvoid redraw(GLvoid) {
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clock_t frame = clock();
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/* set the projection matrix */
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glMatrixMode(GL_PROJECTION);
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glLoadIdentity();
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glOrtho(-ORTHO_SIZE,ORTHO_SIZE,-ORTHO_SIZE,ORTHO_SIZE,15.0,25.0);
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//gluPerspective(20.0,1.0,15.0,25.0);
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glMatrixMode(GL_MODELVIEW);
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glLoadIdentity();
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glTranslatef(0,0,-20.0);
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/* ensure we're drawing to the correct GLUT window */
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glutSetWindow(wid);
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/* clear the color buffers */
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glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
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ppm_rgb temp;
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/* Draw random points */
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for (GLuint i = 0; i < randSites; i++) {
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glPushMatrix();
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if (animate) {
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sites[i].angle += sites[i].angularVelocity;
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}
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if (sites[i].angle >= 2.*M_PI) {
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sites[i].angle -= 2.*M_PI;
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}
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//glRotatef(sites[i].angle,0,0,1);
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/*
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* x = r*cos(angle)
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* y = r*sin(angle)
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*/
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sites[i].x = sites[i].radius * cos(sites[i].angle);
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sites[i].y = sites[i].radius * sin(sites[i].angle);
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glTranslatef(sites[i].x,
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sites[i].y,
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0);
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if (useFile && pImage) {
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temp = getRGB(sites[i].x,sites[i].y);
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glColor3f(temp.r / 255., temp.g / 255., temp.b / 255.);
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} else {
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glColor3f(sites[i].color.r,
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sites[i].color.g,
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sites[i].color.b);
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}
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glCallList(cone);
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if (drawSites) {
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if (siteColorBlack) {
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glColor3f(0,0,0);
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} else {
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glColor3f(1-sites[i].color.r,
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1-sites[i].color.g,
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1-sites[i].color.b);
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}
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glRectf(-siteWidth,-siteWidth,siteWidth,siteWidth);
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}
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glPopMatrix();
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}
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/* flush the pipeline */
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glFlush();
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/* look at our handiwork */
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glutSwapBuffers();
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if (animate && !capFPS) {
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glutPostRedisplay();
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}else if (animate) {
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float temp = CLOCKS_PER_SEC*ONE_OVER_FPS;
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while (clock() - frame < temp);
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glutPostRedisplay();
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}
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}
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/**
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* Mouse button pressed
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*/
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GLvoid mouse_button(GLint btn, GLint state, GLint mx, GLint my)
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{
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return;
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}
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||||
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||||
/**
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* This handles the glut initialization
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||||
*/
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GLint init_glut(GLint *argc, char **argv)
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{
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GLint id;
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||||
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glutInit(argc,argv);
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||||
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||||
/* size and placement hints to the window system */
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||||
glutInitWindowSize(vpd, vpd);
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glutInitWindowPosition(10,10);
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||||
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||||
/* double buffered, RGB color mode */
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||||
glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGB | GLUT_DEPTH);
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||||
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||||
/* create a GLUT window (not drawn until glutMainLoop() is entered) */
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id = glutCreateWindow("cs4451 project 3: Voronoi Diagram");
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||||
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||||
/* register callbacks */
|
||||
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||||
/* window size changes */
|
||||
glutReshapeFunc(window_resize);
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||||
|
||||
/* keypress handling when the current window has input focus */
|
||||
glutKeyboardFunc(keyboard_event);
|
||||
|
||||
/* mouse event handling */
|
||||
glutMouseFunc(mouse_button); /* button press/release */
|
||||
glutMotionFunc(button_motion); /* mouse motion w/ button down */
|
||||
glutPassiveMotionFunc(passive_motion); /* mouse motion with button up */
|
||||
|
||||
/* window obscured/revealed event handler */
|
||||
glutVisibilityFunc(NULL);
|
||||
|
||||
/* handling of keyboard SHIFT, ALT, CTRL keys */
|
||||
glutSpecialFunc(NULL);
|
||||
|
||||
/* what to do when mouse cursor enters/exits the current window */
|
||||
glutEntryFunc(NULL);
|
||||
|
||||
/* what to do on each display loop iteration */
|
||||
glutDisplayFunc(redraw);
|
||||
|
||||
/* Create the menu */
|
||||
|
||||
GLint viewMenu = glutCreateMenu(menu);
|
||||
glutAddMenuEntry("Lines Only (l)",MENU_LINES);
|
||||
glutAddMenuEntry("Full View (f)",MENU_TRIANGLES);
|
||||
|
||||
GLint siteMenu = glutCreateMenu(menu);
|
||||
glutAddMenuEntry("Show/Hide Sites (d)",MENU_DRAWSITES);
|
||||
glutAddMenuEntry("Toggle inverse site coloring (i)",MENU_SITECOLORBLACK);
|
||||
glutAddMenuEntry("Increase site size (+)",MENU_INCREASE_SITE_SIZE);
|
||||
glutAddMenuEntry("Decrease site size (-)",MENU_DECREASE_SITE_SIZE);
|
||||
|
||||
GLint fpsMenu = glutCreateMenu(menu);
|
||||
glutAddMenuEntry("Increase Max FPS (j)",MENU_RESET_FPS);
|
||||
glutAddMenuEntry("Decrease Max FPS (k)",MENU_DECREASE_MAX_FPS);
|
||||
glutAddMenuEntry("Uncap FPS (u)",MENU_UNCAP_FPS);
|
||||
|
||||
/*GLint menuID = */
|
||||
glutCreateMenu(menu);
|
||||
glutAddSubMenu("View Options",viewMenu);
|
||||
glutAddSubMenu("Site Options",siteMenu);
|
||||
glutAddSubMenu("Framerate Options",fpsMenu);
|
||||
glutAddMenuEntry("Spray More Points (s)",MENU_SPRAY_MORE_POINTS);
|
||||
glutAddMenuEntry("Move Points (a)",MENU_ANIMATE);
|
||||
glutAddMenuEntry("Toggle Coloring Method (t)",MENU_DRAWING);
|
||||
glutAddMenuEntry("Reset (r)",MENU_RESET);
|
||||
glutAddMenuEntry("Reset-Randomize (e)",MENU_RANDOMIZE);
|
||||
|
||||
|
||||
glutAttachMenu(GLUT_RIGHT_BUTTON);
|
||||
|
||||
return id;
|
||||
}
|
||||
|
||||
/**
|
||||
* OpenGL initializations
|
||||
*/
|
||||
GLvoid init_opengl(GLvoid)
|
||||
{
|
||||
/* clear to BLACK */
|
||||
glClearColor(0.0, 0.0, 0.0, 1.0);
|
||||
|
||||
/* Enable depth test */
|
||||
glEnable(GL_DEPTH_TEST);
|
||||
}
|
||||
|
||||
|
||||
|
||||
///////////////////////////
|
||||
// Voronoi Diagram stuff //
|
||||
///////////////////////////
|
||||
|
||||
|
||||
GLuint init_cone ( )
|
||||
{
|
||||
GLuint sceneList = glGenLists(1);
|
||||
float temp;
|
||||
|
||||
glNewList(sceneList,GL_COMPILE);
|
||||
glBegin(GL_TRIANGLE_FAN);
|
||||
|
||||
//Initialize the first vertex
|
||||
glVertex3f(0,0,0);
|
||||
|
||||
for (GLuint k = 0; k < numPoints; k++) {
|
||||
temp = (TWOPI*k) / (float)numPoints;
|
||||
glVertex4f(cos(temp),sin(temp),-1,0);
|
||||
}
|
||||
glVertex4f(cos(0.),sin(0.),-1,0);
|
||||
|
||||
glEnd();
|
||||
glEndList();
|
||||
|
||||
return sceneList;
|
||||
}
|
||||
|
||||
|
||||
int main(int argc, char* argv[]) {
|
||||
ppmimage image;
|
||||
srand(time(NULL));
|
||||
|
||||
if (argc >= 2) {
|
||||
image = read_ppmimage(argv[1]);
|
||||
pImage = ℑ
|
||||
}
|
||||
|
||||
wid = init_glut(&argc,argv);
|
||||
init_opengl();
|
||||
|
||||
cone = init_cone();
|
||||
|
||||
sites = (Site*)malloc(sizeof(Site)*randSites);
|
||||
init_random_sites();
|
||||
|
||||
glutMainLoop();
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
Reference in New Issue
Block a user