fsp.rar_FPS_fsp

#include <math.h> #include <GL/glut.h> #include <stdio.h> #include <string.h> #include <stdlib.h> float angle=0.0,deltaAngle = 0.0,ratio; float x=0.0f,y=1.75f,z=5.0f; float lx=0.0f,ly=0.0f,lz=-1.0f; int deltaMove = 0,h,w; int font=(int)GLUT_BITMAP_8_BY_13; static GLint snowman_display_list; //int bitmapHeight=13; int frame,time,timebase=0; char s[30]; void initWindow(); void changeSize(int w1, int h1) { // Prevent a divide by zero, when window is too short // (you cant make a window of zero width). if(h1 == 0) h1 = 1; w = w1; h = h1; ratio = 1.0f * w / h; // Reset the coordinate system before modifying glMatrixMode(GL_PROJECTION); glLoadIdentity(); // Set the viewport to be the entire window glViewport(0, 0, w, h); // Set the clipping volume gluPerspective(45,ratio,0.1,1000); glMatrixMode(GL_MODELVIEW); glLoadIdentity(); gluLookAt(x, y, z, x + lx,y + ly,z + lz, 0.0f,1.0f,0.0f); } void drawSnowMan() { glColor3f(1.0f, 1.0f, 1.0f); // Draw Body glTranslatef(0.0f ,0.75f, 0.0f); glutSolidSphere(0.75f,20,20); // Draw Head glTranslatef(0.0f, 1.0f, 0.0f); glutSolidSphere(0.25f,20,20); // Draw Eyes glPushMatrix(); glColor3f(0.0f,0.0f,0.0f); glTranslatef(0.05f, 0.10f, 0.18f); glutSolidSphere(0.05f,10,10); glTranslatef(-0.1f, 0.0f, 0.0f); glutSolidSphere(0.05f,10,10); glPopMatrix(); // Draw Nose glColor3f(1.0f, 0.5f , 0.5f); glRotatef(0.0f,1.0f, 0.0f, 0.0f); glutSolidCone(0.08f,0.5f,10,2); } GLuint createDL() { GLuint snowManDL; // Create the id for the list snowManDL = glGenLists(2); glNewList(snowManDL+1,GL_COMPILE); drawSnowMan(); glEndList(); // start list glNewList(snowManDL,GL_COMPILE); // call the function that contains the rendering commands for(int i = -3; i < 3; i++) for(int j=-3; j < 3; j++) { glPushMatrix(); glTranslatef(i*10.0,0,j * 10.0); glCallList(snowManDL+1); glPopMatrix(); } // endList glEndList(); return(snowManDL); } void initScene() { glEnable(GL_DEPTH_TEST); snowman_display_list = createDL(); } void orientMe(float ang) { lx = sin(ang); lz = -cos(ang); glLoadIdentity(); gluLookAt(x, y, z, x + lx,y + ly,z + lz, 0.0f,1.0f,0.0f); } void moveMeFlat(int i) { x = x + i*(lx)*0.1; z = z + i*(lz)*0.1; glLoadIdentity(); gluLookAt(x, y, z, x + lx,y + ly,z + lz, 0.0f,1.0f,0.0f); } void setOrthographicProjection() { // switch to projection mode glMatrixMode(GL_PROJECTION); // save previous matrix which contains the //settings for the perspective projection glPushMatrix(); // reset matrix glLoadIdentity(); // set a 2D orthographic projection gluOrtho2D(0, w, 0, h); // invert the y axis, down is positive glScalef(0, -1, 1); // mover the origin from the bottom left corner // to the upper left corner glTranslatef(0, -h, 0); glMatrixMode(GL_MODELVIEW); } void resetPerspectiveProjection() { // set the current matrix to GL_PROJECTION glMatrixMode(GL_PROJECTION); // restore previous settings glPopMatrix(); // get back to GL_MODELVIEW matrix glMatrixMode(GL_MODELVIEW); } void renderBitmapString(float x, float y, void *font,char *string) { char *c; // set position to start drawing fonts glRasterPos3f(x, y,0); // loop all the characters in the string for (c=string; *c != '\0'; c++) { glutBitmapCharacter(font, *c); } } void renderScene(void) { if (deltaMove) moveMeFlat(deltaMove); if (deltaAngle) { angle += deltaAngle; orientMe(angle); } glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); // Draw ground glColor3f(0.9f, 0.9f, 0.9f); glBegin(GL_QUADS); glVertex3f(-100.0f, 0.0f, -100.0f); glVertex3f(-100.0f, 0.0f, 100.0f); glVertex3f( 100.0f, 0.0f, 100.0f); glVertex3f( 100.0f, 0.0f, -100.0f); glEnd(); // Draw 36 SnowMen glCallList(snowman_display_list); frame++; time=glutGet(GLUT_ELAPSED_TIME); if (time - timebase > 1000) { sprintf(s,"FPS:%4.2f",frame*1000.0/(time-timebase)); timebase = time; frame = 0; } glColor3f(0.0f,1.0f,1.0f); setOrthographicProjection(); glPushMatrix(); glLoadIdentity(); renderBitmapString(30,15,(void *)font,"GLUT Tutorial @ 3D Tech"); renderBitmapString(30,35,(void *)font,s); renderBitmapString(30,55,(void *)font,"Esc - Quit"); glPopMatrix(); resetPerspectiveProjection(); glutSwapBuffers(); } void processNormalKeys(unsigned char key, int x, int y) { if (key == 27) exit(0); } void pressKey(int key, int x, int y) { switch (key) { case GLUT_KEY_LEFT : deltaAngle = -0.01f;break; case GLUT_KEY_RIGHT : deltaAngle = 0.01f;break; case GLUT_KEY_UP : deltaMove = 1;break; case GLUT_KEY_DOWN : deltaMove = -1;break; } } void releaseKey(int key, int x, int y) { switch (key) { case GLUT_KEY_LEFT : if (deltaAngle < 0.0f) deltaAngle = 0.0f; break; case GLUT_KEY_RIGHT : if (deltaAngle > 0.0f) deltaAngle = 0.0f; break; case GLUT_KEY_UP : if (deltaMove > 0) deltaMove = 0; break; case GLUT_KEY_DOWN : if (deltaMove < 0) deltaMove = 0; break; } } void initWindow() { glutIgnoreKeyRepeat(1); glutKeyboardFunc(processNormalKeys); glutSpecialFunc(pressKey); glutSpecialUpFunc(releaseKey); glutDisplayFunc(renderScene); glutIdleFunc(renderScene); glutReshapeFunc(changeSize); initScene(); } int main(int argc, char **argv) { glutInit(&argc, argv); glutInitDisplayMode(GLUT_DEPTH | GLUT_DOUBLE | GLUT_RGBA); glutInitWindowPosition(100,100); glutInitWindowSize(640,360); glutCreateWindow("SnowMen from Lighthouse3D"); // register all callbacks initWindow(); glutMainLoop(); return(0); }