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simpler event loop

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a dinosaur
2024-03-12 21:00:31 +11:00
parent bfa90f838d
commit 70817e6e6d
1 changed files with 126 additions and 127 deletions
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253
Lesson10.c
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@@ -421,34 +421,42 @@ bool CreateGLWindow(char *title, int width, int height, int bits, bool fullscree
return true; // Success return true; // Success
} }
void WndProc(SDL_Event *uMsg)
bool done = false; // Bool Variable To Exit Loop
void WndProc(SDL_Event *event)
{ {
switch (uMsg->type) // Check For Windows Messages switch (event->type) // Check For Windows Messages
{ {
case SDL_EVENT_KEY_DOWN: // Is A Key Being Held Down? case SDL_EVENT_QUIT: // Have We Received A Quit Message?
{ {
keys[uMsg->key.keysym.scancode] = true; // If So, Mark It As TRUE done = true; // If So done=TRUE
break; // Jump Back break;
} }
case SDL_EVENT_KEY_UP: // Has A Key Been Released? case SDL_EVENT_KEY_DOWN: // Is A Key Being Held Down?
{ {
keys[uMsg->key.keysym.scancode] = false; // If So, Mark It As FALSE keys[event->key.keysym.scancode] = true; // If So, Mark It As TRUE
break; // Jump Back break; // Jump Back
} }
case SDL_EVENT_WINDOW_PIXEL_SIZE_CHANGED: // Resize The OpenGL Window case SDL_EVENT_KEY_UP: // Has A Key Been Released?
{ {
ReSizeGLScene(uMsg->window.data1, uMsg->window.data2); // LoWord=Width, HiWord=Height keys[event->key.keysym.scancode] = false; // If So, Mark It As FALSE
break; // Jump Back break; // Jump Back
} }
case SDL_EVENT_WINDOW_PIXEL_SIZE_CHANGED: // Resize The OpenGL Window
{
ReSizeGLScene(event->window.data1, event->window.data2); // data1=Width, data2=Height
break; // Jump Back
}
default: break;
} }
} }
int main(int argc, char *argv[]) int main(int argc, char *argv[])
{ {
SDL_Event msg; // Windows Message Structure
bool done = false; // Bool Variable To Exit Loop
SDL_Init(SDL_INIT_VIDEO); SDL_Init(SDL_INIT_VIDEO);
@@ -478,136 +486,127 @@ int main(int argc, char *argv[])
while (!done) // Loop That Runs While done=FALSE while (!done) // Loop That Runs While done=FALSE
{ {
if (SDL_PollEvent(&msg) > 0) // Is There A Message Waiting? SDL_Event event; // SDL Event Structure
while (SDL_PollEvent(&event) > 0) // Is There A Message Waiting?
{ {
if (msg.type == SDL_EVENT_QUIT) // Have We Received A Quit Message? WndProc(&event); // Deal with events
}
// Draw The Scene. Watch For ESC Key And Quit Messages From DrawGLScene()
if ((active && !DrawGLScene()) || keys[SDL_SCANCODE_ESCAPE]) // Active? Was There A Quit Received?
{
done = true; // ESC or DrawGLScene Signalled A Quit
break;
}
SDL_GL_SwapWindow(win); // Swap Buffers (Double Buffering)
if (keys[SDL_SCANCODE_B] && !bpressed)
{
bpressed = true;
blend = !blend;
if (!blend)
{ {
done = true; // If So done=TRUE glDisable(GL_BLEND);
glEnable(GL_DEPTH_TEST);
} }
else // If Not, Deal With Window Messages else
{ {
WndProc(&msg); glEnable(GL_BLEND);
glDisable(GL_DEPTH_TEST);
} }
} }
else // If There Are No Messages if (!keys[SDL_SCANCODE_B])
{ {
// Draw The Scene. Watch For ESC Key And Quit Messages From DrawGLScene() bpressed = false;
if ((active && !DrawGLScene()) || keys[SDL_SCANCODE_ESCAPE]) // Active? Was There A Quit Received? }
if (keys[SDL_SCANCODE_F] && !fpressed)
{
fpressed = true;
filter += 1;
if (filter > 2)
{ {
done = true; // ESC or DrawGLScene Signalled A Quit filter = 0;
} }
else // Not Time To Quit, Update Screen }
if (!keys[SDL_SCANCODE_F])
{
fpressed = false;
}
if (keys[SDL_SCANCODE_PAGEUP])
{
z -= 0.02f;
}
if (keys[SDL_SCANCODE_PAGEDOWN])
{
z += 0.02f;
}
if (keys[SDL_SCANCODE_UP])
{
xpos -= (float)sin(heading * piover180) * 0.05f;
zpos -= (float)cos(heading * piover180) * 0.05f;
if (walkbiasangle >= 359.0f)
{ {
SDL_GL_SwapWindow(win); // Swap Buffers (Double Buffering) walkbiasangle = 0.0f;
if (keys[SDL_SCANCODE_B] && !bpressed) }
{ else
bpressed = true; {
blend = !blend; walkbiasangle += 10;
if (!blend) }
{ walkbias = (float)sin(walkbiasangle * piover180) / 20.0f;
glDisable(GL_BLEND); }
glEnable(GL_DEPTH_TEST);
}
else
{
glEnable(GL_BLEND);
glDisable(GL_DEPTH_TEST);
}
}
if (!keys[SDL_SCANCODE_B])
{
bpressed = false;
}
if (keys[SDL_SCANCODE_F] && !fpressed) if (keys[SDL_SCANCODE_DOWN])
{ {
fpressed = true; xpos += (float)sin(heading*piover180) * 0.05f;
filter += 1; zpos += (float)cos(heading*piover180) * 0.05f;
if (filter > 2) if (walkbiasangle <= 1.0f)
{ {
filter = 0; walkbiasangle = 359.0f;
} }
} else
if (!keys[SDL_SCANCODE_F]) {
{ walkbiasangle -= 10;
fpressed = false; }
} walkbias = (float)sin(walkbiasangle * piover180) / 20.0f;
}
if (keys[SDL_SCANCODE_PAGEUP]) if (keys[SDL_SCANCODE_RIGHT])
{ {
z -= 0.02f; heading -= 1.0f;
} yrot = heading;
}
if (keys[SDL_SCANCODE_PAGEDOWN]) if (keys[SDL_SCANCODE_LEFT])
{ {
z += 0.02f; heading += 1.0f;
} yrot = heading;
}
if (keys[SDL_SCANCODE_UP]) if (keys[SDL_SCANCODE_PAGEUP])
{ {
lookupdown -= 1.0f;
}
xpos -= (float)sin(heading * piover180) * 0.05f; if (keys[SDL_SCANCODE_PAGEDOWN])
zpos -= (float)cos(heading * piover180) * 0.05f; {
if (walkbiasangle >= 359.0f) lookupdown += 1.0f;
{ }
walkbiasangle = 0.0f;
}
else
{
walkbiasangle += 10;
}
walkbias = (float)sin(walkbiasangle * piover180) / 20.0f;
}
if (keys[SDL_SCANCODE_DOWN]) if (keys[SDL_SCANCODE_F1]) // Is F1 Being Pressed?
{ {
xpos += (float)sin(heading*piover180) * 0.05f; keys[SDL_SCANCODE_F1] = false; // If So Make Key FALSE
zpos += (float)cos(heading*piover180) * 0.05f; FreeResources();
if (walkbiasangle <= 1.0f) KillGLWindow(); // Kill Our Current Window
{ fullscreen = !fullscreen; // Toggle Fullscreen / Windowed Mode
walkbiasangle = 359.0f; // Recreate Our OpenGL Window
} if (!CreateGLWindow("Lionel Brits & NeHe's 3D World Tutorial", 640, 480, 16, fullscreen))
else {
{ return 0; // Quit If Window Was Not Created
walkbiasangle -= 10;
}
walkbias = (float)sin(walkbiasangle * piover180) / 20.0f;
}
if (keys[SDL_SCANCODE_RIGHT])
{
heading -= 1.0f;
yrot = heading;
}
if (keys[SDL_SCANCODE_LEFT])
{
heading += 1.0f;
yrot = heading;
}
if (keys[SDL_SCANCODE_PAGEUP])
{
lookupdown -= 1.0f;
}
if (keys[SDL_SCANCODE_PAGEDOWN])
{
lookupdown += 1.0f;
}
if (keys[SDL_SCANCODE_F1]) // Is F1 Being Pressed?
{
keys[SDL_SCANCODE_F1] = false; // If So Make Key FALSE
FreeResources();
KillGLWindow(); // Kill Our Current Window
fullscreen = !fullscreen; // Toggle Fullscreen / Windowed Mode
// Recreate Our OpenGL Window
if (!CreateGLWindow("Lionel Brits & NeHe's 3D World Tutorial", 640, 480, 16, fullscreen))
{
return 0; // Quit If Window Was Not Created
}
}
} }
} }
} }