Find a C language OpenGL code

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Use OpenGL to make a small ball move in a square space. When it hits the wall, it will rebound. Please do not come to Baidu. Thank you.

Best Answer

// Bounce. C // demonstrates a simple animated rectangle program with glut // OpenGL superbible, 2nd Edition // Richard S. wright Jr. # include "stdafx. H "# include <windows. h> # include <Gl/glut. h> // initial square position and sizeglfloat X1 = 100366f; glfloat Y1 = 150366f; glsizei rsize = 50; // step size in X and Y directions // (number of pixels to move each time) glfloat xstep = 1.0f; glfloat ystep = 1.0f; // ke EP track of Windows changing width and heightglfloat refreshing wwidth; glfloat refreshing wheight; // called to draw scenevoid renderscene (void) {// clear the window with current clearing color glclear (gl_color_buffer_bit ); // set current drawing color to Red // r g B glcolor3f (1.0f, 0.0f, 0.0f); // draw a filled rectangle with current color glrectf (x1, Y1, x1 + rsize, Y1 + rsize); // flush drawing commands gluts Wapbuffers ();} // called by glut library when idle (Window not being // resized or moved) void timerfunction (INT value) {// reverse direction when you reach left or right edge if (x1> 1_wwidth-rsize | X1 <0) xstep =-xstep; // reverse direction when you reach top or bottom edge if (Y1> running wheight-rsize | Y1 <0) ystep =-ystep; // check bounds. this is incase the window is made // smaller Nd the rectangle is outside the new // clipping volume if (x1> drawing wwidth-rsize) x1 = windowWidth-rsize-1; If (Y1> drawing wheight-rsize) Y1 = windowHeight-rsize-1; // actually move the square X1 + = xstep; Y1 + = ystep; // redraw the scene with new coordinates glupostredisplay (); glutimerfunc (33, timerfunction, 1 );} // setup the rendering statevoid setuprc (void) {// set clear color to Blue glclearc Olor (0.0f, 0.0f, 1.0f, 1.0f);} // called by glut library when the window has chanaged sizevoid changesize (glsizei W, glsizei H) {// prevent a divide by zero if (H = 0) H = 1; // set viewport to window dimensions glviewport (0, 0, W, H ); // reset coordinate system glmatrixmode (gl_projection); glloadidentity (); // keep the square, this time, save calculated // width and height for later use I F (W <= h) {running wheight = 2500000f * H/W; running wwidth = 2500000f;} else {running wwidth = 2500000f * W/H; running wheight = 2500000f ;} // set the clipping volume glortho (0.0f, expires wwidth, 0.0f, interval wheight, 1.0f,-1.0f); glmatrixmode (gl_modelview); glloadidentity ();} // main program entry pointvoid main (void) {gluinitdisplaymode (glu_double | glu_rgb); glucreatewindow ("Bounce"); gludisplayfunc (rendersce Ne); glureshapefunc (changesize); glutimerfunc (33, timerfunction, 1); setuprc (); glumainloop ();} // It is square. Change it ~ The program should be compiled by yourself to make progress. Come on!