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Fixed the fireworks demo

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This commit is contained in:
Sam Lantinga 2011-02-20 14:59:36 -08:00
parent 9ed73976a5
commit 1c631c853c
2 changed files with 28 additions and 17 deletions
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12
Xcode-iPhoneOS/Demos/DemosiPhoneOS.xcodeproj/project.pbxproj
View file

@ -1059,11 +1059,7 @@
GCC_PREFIX_HEADER = "";
INFOPLIST_FILE = Info.plist;
INSTALL_PATH = "$(HOME)/Applications";
LIBRARY_SEARCH_PATHS = (
"$(inherited)",
"\\\"$(SRCROOT)\\\"",
"\"$(SRCROOT)/../SDL/build/Debug-iphoneos\"",
);
LIBRARY_SEARCH_PATHS = "$(inherited)";
PREBINDING = NO;
PRODUCT_NAME = Fireworks;
SDKROOT = iphoneos;
@ -1082,11 +1078,7 @@
GCC_PREFIX_HEADER = "";
INFOPLIST_FILE = Info.plist;
INSTALL_PATH = "$(HOME)/Applications";
LIBRARY_SEARCH_PATHS = (
"$(inherited)",
"\\\"$(SRCROOT)\\\"",
"\"$(SRCROOT)/../SDL/build/Debug-iphoneos\"",
);
LIBRARY_SEARCH_PATHS = "$(inherited)";
PREBINDING = NO;
PRODUCT_NAME = Fireworks;
SDKROOT = iphoneos;

33
Xcode-iPhoneOS/Demos/src/fireworks.c
View file

@ -45,6 +45,7 @@ struct particle
} particles[MAX_PARTICLES]; /* this array holds all our particles */
static int num_active_particles; /* how many members of the particle array are actually being drawn / animated? */
static int screen_w, screen_h;
/* function declarations */
void spawnTrailFromEmitter(struct particle *emitter);
@ -82,11 +83,11 @@ stepParticles(void)
/* is the particle actually active, or is it marked for deletion? */
if (curr->isActive) {
/* is the particle off the screen? */
if (curr->y > SCREEN_HEIGHT)
if (curr->y > screen_h)
curr->isActive = 0;
else if (curr->y < 0)
curr->isActive = 0;
if (curr->x > SCREEN_WIDTH)
if (curr->x > screen_w)
curr->isActive = 0;
else if (curr->x < 0)
curr->isActive = 0;
@ -290,12 +291,12 @@ spawnEmitterParticle(GLfloat x, GLfloat y)
break;
}
p->color[3] = 255;
/* set position to (x, SCREEN_HEIGHT) */
/* set position to (x, screen_h) */
p->x = x;
p->y = SCREEN_HEIGHT;
p->y = screen_h;
/* set velocity so that terminal point is (x,y) */
p->xvel = 0;
p->yvel = -sqrt(2 * ACCEL * (SCREEN_HEIGHT - y));
p->yvel = -sqrt(2 * ACCEL * (screen_h - y));
/* set other attributes */
p->size = 10;
p->type = emitter;
@ -361,6 +362,8 @@ int
main(int argc, char *argv[])
{
SDL_Window *window; /* main window */
SDL_GLContext context;
int w, h;
Uint32 startFrame; /* time frame began to process */
Uint32 endFrame; /* time frame ended processing */
Uint32 delay; /* time to pause waiting to draw next frame */
@ -388,7 +391,7 @@ main(int argc, char *argv[])
window = SDL_CreateWindow(NULL, 0, 0, SCREEN_WIDTH, SCREEN_HEIGHT,
SDL_WINDOW_OPENGL | SDL_WINDOW_SHOWN |
SDL_WINDOW_BORDERLESS);
SDL_CreateRenderer(window, 0, 0);
context = SDL_GL_CreateContext(window);
/* load the particle texture */
initializeTexture();
@ -400,6 +403,22 @@ main(int argc, char *argv[])
SDL_GL_ExtensionSupported("GL_OES_point_size_array");
/* set up some OpenGL state */
glDisable(GL_DEPTH_TEST);
glDisable(GL_CULL_FACE);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
SDL_GetWindowSize(window, &screen_w, &screen_h);
glViewport(0, 0, screen_w, screen_h);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
glOrthof((GLfloat) 0,
(GLfloat) screen_w,
(GLfloat) screen_h,
(GLfloat) 0, 0.0, 1.0);
glEnable(GL_TEXTURE_2D);
glEnable(GL_BLEND);
glBlendFunc(GL_SRC_ALPHA, GL_ONE);
@ -434,7 +453,7 @@ main(int argc, char *argv[])
}
stepParticles();
drawParticles();
SDL_GL_SwapWindow(window);
SDL_GL_SwapWindow(window);
endFrame = SDL_GetTicks();
/* figure out how much time we have left, and then sleep */