fire.c
上传用户:xk288cn
上传日期:2007-05-28
资源大小:4876k
文件大小:13k
- #include <math.h>
- #include <stdio.h>
- #include <stdlib.h>
- #include <GL/glut.h>
- #include "texture.h"
- #include "sm.h"
- /* Some <math.h> files do not define M_PI... */
- #ifndef M_PI
- #define M_PI 3.14159265358979323846
- #endif
- #ifndef __sgi
- /* Most math.h's do not define float versions of the trig functions. */
- #define sinf(x) ((float)sin((x)))
- #define cosf(x) ((float)cos((x)))
- #define atan2f(y, x) ((float)atan2((y), (x)))
- #endif
- #if !defined(GL_VERSION_1_1) && !defined(GL_VERSION_1_2)
- #define glBindTexture glBindTextureEXT
- #endif
- static void *smoke;
- static int marshmallow;
- static int the_texture;
- static int texture_count;
- static int texture = 1;
- static float rot = 0;
- static float opacity = 1.0;
- static float intensity = 1.0;
- static float transx, transy, rotx, roty;
- static int ox = -1, oy = -1;
- static int mot = 0;
- #define PAN 1
- #define ROT 2
- void
- pan(int x, int y) {
- transx += (x-ox)/500.;
- transy -= (y-oy)/500.;
- ox = x; oy = y;
- glutPostRedisplay();
- }
- void
- rotate(int x, int y) {
- rotx += x-ox;
- if (rotx > 360.) rotx -= 360.;
- else if (rotx < -360.) rotx += 360.;
- roty += y-oy;
- if (roty > 360.) roty -= 360.;
- else if (roty < -360.) roty += 360.;
- ox = x; oy = y;
- glutPostRedisplay();
- }
- void
- motion(int x, int y) {
- if (mot == PAN) pan(x, y);
- else if (mot == ROT) rotate(x,y);
- }
- void
- mouse(int button, int state, int x, int y) {
- if(state == GLUT_DOWN) {
- switch(button) {
- case GLUT_LEFT_BUTTON:
- mot = PAN;
- motion(ox = x, oy = y);
- break;
- case GLUT_RIGHT_BUTTON:
- mot = ROT;
- motion(ox = x, oy = y);
- break;
- case GLUT_MIDDLE_BUTTON:
- break;
- }
- } else if (state == GLUT_UP) {
- mot = 0;
- }
- }
- void afunc(void) {
- static int state;
- if (state ^= 1)
- glEnable(GL_ALPHA_TEST);
- else
- glDisable(GL_ALPHA_TEST);
- }
- void bfunc(void) {
- static int state;
- if (state ^= 1)
- glEnable(GL_BLEND);
- else
- glDisable(GL_BLEND);
- }
- void mfunc(void) {
- marshmallow += 1;
- if (marshmallow > 2) marshmallow = 0;
- }
- void sfunc(void) {
- the_texture++;
- if (the_texture >= texture_count) the_texture = 0;
- }
- void tfunc(void) {
- static int state;
- if (state ^= 1)
- glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
- else
- glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
- }
- void fourfunc(void) {
- static int state;
- GLenum wrap;
- int i;
- glMatrixMode(GL_TEXTURE);
- if (state ^= 1) {
- wrap = GL_REPEAT;
- glScalef(4.f, 4.f, 1.f);
- } else {
- wrap = GL_CLAMP;
- glLoadIdentity();
- }
- glMatrixMode(GL_MODELVIEW);
- for(i = 0; i < texture_count; i++) {
- glBindTexture(GL_TEXTURE_2D, i+1);
- glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, wrap);
- glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, wrap);
- }
- }
- void help(void) {
- printf("Usage: fire image0 ... imagenn");
- printf("'h' - helpn");
- printf("'a' - toggle alpha testn");
- printf("'b' - toggle blendn");
- printf("'s' - single stepn");
- printf("'t' - toggle MODULATE or REPLACEn");
- printf("'m' - marshmallown");
- printf("'x' - toggle animationn");
- printf("left mouse - pann");
- printf("right mouse - rotaten");
- }
- void init(int argc, char *argv[]) {
- unsigned *image;
- int i, width, height, components;
- GLfloat pos[] = { 0.f, 1.f, 1.f, 0.f};
- glEnable(GL_TEXTURE_2D);
- glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
- for(i = 0; i < argc; i++) {
- image = read_texture(argv[i], &width, &height, &components);
- if (image == NULL) {
- fprintf(stderr, "Error: Can't load image file "%s".n",
- argv[i]);
- exit(EXIT_FAILURE);
- } else {
- printf("%d x %d image loadedn", width, height);
- }
- glBindTexture(GL_TEXTURE_2D, i+1);
- glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
- glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
- glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP);
- glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP);
- glTexImage2D(GL_TEXTURE_2D, 0, components, width,
- height, 0, GL_RGBA, GL_UNSIGNED_BYTE, image);
- texture_count++;
- }
- glBindTexture(GL_TEXTURE_2D, 1+texture_count);
- image = read_texture("../data/smoke.bw", &width, &height, &components);
- if (image == NULL) {
- fprintf(stderr, "Error: Can't load image file "%s".n", "smoke.la");
- exit(EXIT_FAILURE);
- }
- glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
- glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
- glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP);
- glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP);
- glTexImage2D(GL_TEXTURE_2D, 0, components, width,
- height, 0, GL_RGBA, GL_UNSIGNED_BYTE, image);
- smoke = new_smoke(0.f, 0.f, 0.f, .0f, 2.5f, 0.f, 25, .4f, 1+texture_count);
- glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
- glEnable(GL_TEXTURE_2D);
- glClearColor(.25f, .25f, .25f, .25f);
- glLightfv(GL_LIGHT0, GL_POSITION, pos);
- glMatrixMode(GL_PROJECTION);
- glLoadIdentity();
- gluPerspective(50.,1.,.1,20.);
- glMatrixMode(GL_MODELVIEW);
- glLoadIdentity();
- glTranslatef(0.,0.,-5.5);
- glClearColor(.25f, .25f, .75f, .25f);
- glAlphaFunc(GL_GREATER, 0.016f);
- glEnable(GL_ALPHA_TEST);
- glEnable(GL_BLEND);
- glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
- glEnable(GL_DEPTH_TEST);
- glEnable(GL_LIGHT0);
- glEnable(GL_NORMALIZE);
- }
- void
- animate(void) {
- static int cnt;
- if (cnt++ == 2) {
- the_texture++;
- if (the_texture >= texture_count) the_texture = 0;
- cnt = 0;
- }
- update_smoke(smoke, .003);
- glutPostRedisplay();
- }
- void
- xfunc(void) {
- static int state = 1;
- glutIdleFunc((state ^= 1) ? animate : NULL);
- }
- void
- cube(void) {
- glBegin(GL_QUADS);
- glNormal3f(0.f, 0.f, -1.f);
- glTexCoord2f(0.0, 0.0); glVertex3f(-1.0, -1.0, -1.0);
- glTexCoord2f(1.0, 0.0); glVertex3f( 1.0, -1.0, -1.0);
- glTexCoord2f(1.0, 1.0); glVertex3f( 1.0, 1.0, -1.0);
- glTexCoord2f(0.0, 1.0); glVertex3f(-1.0, 1.0, -1.0);
- glNormal3f(0.f, 0.f, 1.f);
- glTexCoord2f(0.0, 0.0); glVertex3f(-1.0, -1.0, 1.0);
- glTexCoord2f(1.0, 0.0); glVertex3f( 1.0, -1.0, 1.0);
- glTexCoord2f(1.0, 1.0); glVertex3f( 1.0, 1.0, 1.0);
- glTexCoord2f(0.0, 1.0); glVertex3f(-1.0, 1.0, 1.0);
- glNormal3f(0.f, 1.f, 0.f);
- glTexCoord2f(0.0, 0.0); glVertex3f(-1.0, 1.0, -1.0);
- glTexCoord2f(1.0, 0.0); glVertex3f( 1.0, 1.0, -1.0);
- glTexCoord2f(1.0, 1.0); glVertex3f( 1.0, 1.0, 1.0);
- glTexCoord2f(0.0, 1.0); glVertex3f(-1.0, 1.0, 1.0);
- glNormal3f(0.f, -1.f, 0.f);
- glTexCoord2f(0.0, 0.0); glVertex3f(-1.0, -1.0, -1.0);
- glTexCoord2f(1.0, 0.0); glVertex3f( 1.0, -1.0, -1.0);
- glTexCoord2f(1.0, 1.0); glVertex3f( 1.0, -1.0, 1.0);
- glTexCoord2f(0.0, 1.0); glVertex3f(-1.0, -1.0, 1.0);
- glNormal3f( 1.f, 0.f, 0.f);
- glTexCoord2f(0.0, 0.0); glVertex3f( 1.0, -1.0, -1.0);
- glTexCoord2f(1.0, 0.0); glVertex3f( 1.0, 1.0, -1.0);
- glTexCoord2f(1.0, 1.0); glVertex3f( 1.0, 1.0, 1.0);
- glTexCoord2f(0.0, 1.0); glVertex3f( 1.0, -1.0, 1.0);
- glNormal3f(-1.f, 0.f, 0.f);
- glTexCoord2f(0.0, 0.0); glVertex3f(-1.0, -1.0, -1.0);
- glTexCoord2f(1.0, 0.0); glVertex3f(-1.0, 1.0, -1.0);
- glTexCoord2f(1.0, 1.0); glVertex3f(-1.0, 1.0, 1.0);
- glTexCoord2f(0.0, 1.0); glVertex3f(-1.0, -1.0, 1.0);
- glEnd();
- }
- void
- logs(void) {
- static GLUquadricObj *quadric;
- if (!quadric) {
- quadric = gluNewQuadric();
- glNewList(100, GL_COMPILE);
- gluQuadricOrientation(quadric, GLU_OUTSIDE);
- glTranslatef(0.f, 0.f, -2.f);
- gluCylinder(quadric, .5, .5, 4., 5, 1);
- glTranslatef(0.f, 0.f, 4.f);
- gluDisk(quadric, 0., .5, 10, 1);
- glTranslatef(0.f, 0.f, -4.f);
- gluQuadricOrientation(quadric, GLU_INSIDE);
- gluDisk(quadric, 0., .5, 10, 1);
- glEndList();
- }
- glPushMatrix();
- glTranslatef(0.f, -.5f, 0.f);
- glColor3f(.55f, .14f, .14f);
- glPushMatrix();
- glRotatef(55., 0., 1., 0.);
- glCallList(100);
- glPopMatrix();
- glPushMatrix();
- glRotatef(-55., 0., 1., 0.);
- glCallList(100);
- glPopMatrix();
- if (marshmallow) {
- glPushMatrix();
- glColor4f(1.f, 1.f, 1.f, 1.f);
- glTranslatef(0.f, 1.7f, 0.f);
- glRotatef(45.f, 0.f, 0.f, 1.f);
- glRotatef(90.f, 0.f, 1.f, 0.f);
- glScalef(1., 1., .25f);
- glCallList(100);
- glPopMatrix();
- glPushMatrix();
- glColor4f(.1f, .1f, .1f, 1.f);
- glTranslatef(1.5f, 3.4f, 0.f);
- glRotatef(45.f, 0.f, 0.f, 1.f);
- glRotatef(90.f, 0.f, 1.f, 0.f);
- glScalef(.2f, .2f, 1.f);
- glCallList(100);
- glPopMatrix();
- if (marshmallow == 2) {
- extern void drawDinosaur(void);
- glDisable(GL_COLOR_MATERIAL);
- glPushMatrix();
- glTranslatef(10.f, 0.f, 0.f);
- glRotatef(180.f, 0.f, 1.f, 0.f);
- glScalef(.5f, .5f, .5f);
- drawDinosaur();
- glPopMatrix();
- }
- }
- glPopMatrix();
- }
- static void calcMatrix(void);
- void display(void) {
- glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
- glLoadIdentity();
- #define RAD(x) (((x)*M_PI)/180.)
- gluLookAt(-sinf(RAD(rotx))*5.5,transy,cosf(RAD(rotx))*5.5, 0.,0.,0., 0.,1.,0.);
- glTranslatef(0.f, 0.f, transx*10.f);
- /* floor */
- glColor4f(0.f,.2f,0.f,1.f);
- glBegin(GL_POLYGON);
- glVertex3f(-4.0, -1.0, -4.0);
- glVertex3f( 4.0, -1.0, -4.0);
- glVertex3f( 4.0, -1.0, 4.0);
- glVertex3f(-4.0, -1.0, 4.0);
- glEnd();
- glEnable(GL_COLOR_MATERIAL);
- glEnable(GL_LIGHTING);
- glColor3f(.1f,.1f,.1f);
- glPushMatrix();
- glTranslatef(-1.f, -1.+.2f, -1.5f);
- glScalef(.2f,.2f, .2f);
- logs();
- /*cube();*/
- glDisable(GL_LIGHTING);
- glPopMatrix();
- glPushMatrix();
- glTranslatef(-1.f, -1.f+.2f, -1.5f);
- calcMatrix();
- draw_smoke(smoke);
- glPopMatrix();
- glPushMatrix();
- glTranslatef(/*(delta/2.f*/-1.f, /*delta*/-.25f, -1.5f);
- calcMatrix();
- glScalef(1.f,1.f,1.);
- if (texture) {
- glBindTexture(GL_TEXTURE_2D, the_texture+1);
- glEnable(GL_TEXTURE_2D);
- }
- glColor4f(intensity, intensity, intensity, opacity);
- glRotatef(rot, 0., 0., 1.);
- glDepthMask(0);
- glBegin(GL_POLYGON);
- glTexCoord2f(0.0, 0.0); glVertex2f(-1.0, -1.0);
- glTexCoord2f(1.0, 0.0); glVertex2f(1.0, -1.0);
- glTexCoord2f(1.0, 1.0); glVertex2f(1.0, 1.0);
- glTexCoord2f(0.0, 1.0); glVertex2f(-1.0, 1.0);
- glEnd();
- glDepthMask(1);
- glPopMatrix();
- glDisable(GL_TEXTURE_2D);
- glutSwapBuffers();
- }
- void reshape(int w, int h) {
- glViewport(0, 0, w, h);
- }
- /* ARGSUSED1 */
- void
- key(unsigned char key, int x, int y) {
- switch(key) {
- case 'a': afunc(); break;
- case 'b': bfunc(); break;
- case 'h': help(); break;
- case 'm': mfunc(); break;
- case 's': sfunc(); break;
- case 't': tfunc(); break;
- case 'x': xfunc(); break;
- case ' 33': exit(EXIT_SUCCESS); break;
- default: break;
- }
- glutPostRedisplay();
- }
- int main(int argc, char** argv) {
- glutInitWindowSize(512, 512);
- glutInit(&argc, argv);
- glutInitDisplayMode(GLUT_RGBA|GLUT_DOUBLE|GLUT_DEPTH);
- (void)glutCreateWindow(argv[0]);
- init(argc-1, argv+1);
- glutDisplayFunc(display);
- glutKeyboardFunc(key);
- glutReshapeFunc(reshape);
- glutMouseFunc(mouse);
- glutMotionFunc(motion);
- glutIdleFunc(animate);
- glutMainLoop();
- return 0;
- }
- void
- buildRot(float theta, float x, float y, float z, float m[16]) {
- float d = x*x + y*y + z*z;
- float ct = cosf(RAD(theta)), st = sinf(RAD(theta));
- /* normalize */
- if (d > 0) {
- d = 1/d;
- x *= d;
- y *= d;
- z *= d;
- }
- m[ 0] = 1; m[ 1] = 0; m[ 2] = 0; m[ 3] = 0;
- m[ 4] = 0; m[ 5] = 1; m[ 6] = 0; m[ 7] = 0;
- m[ 8] = 0; m[ 9] = 0; m[10] = 1; m[11] = 0;
- m[12] = 0; m[13] = 0; m[14] = 0; m[15] = 1;
- /* R = uu' + cos(theta)*(I-uu') + sin(theta)*S
- *
- * S = 0 -z y u' = (x, y, z)
- * z 0 -x
- * -y x 0
- */
- m[0] = x*x + ct*(1-x*x) + st*0;
- m[4] = x*y + ct*(0-x*y) + st*-z;
- m[8] = x*z + ct*(0-x*z) + st*y;
- m[1] = y*x + ct*(0-y*x) + st*z;
- m[5] = y*y + ct*(1-y*y) + st*0;
- m[9] = y*z + ct*(0-y*z) + st*-x;
- m[2] = z*x + ct*(0-z*x) + st*-y;
- m[6] = z*y + ct*(0-z*y) + st*x;
- m[10]= z*z + ct*(1-z*z) + st*0;
- }
- static void
- calcMatrix(void) {
- float mat[16];
- glGetFloatv(GL_MODELVIEW_MATRIX, mat);
- buildRot(-180*atan2f(mat[8], mat[10])/M_PI, 0, 1, 0, mat);
- glMultMatrixf(mat);
- }