mirror of
https://github.com/ScrelliCopter/Lesson10-SDL3.git
synced 2025-02-21 07:19:26 +11:00
simpler event loop
This commit is contained in:
253
Lesson10.c
253
Lesson10.c
@@ -421,34 +421,42 @@ bool CreateGLWindow(char *title, int width, int height, int bits, bool fullscree
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return true; // Success
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}
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void WndProc(SDL_Event *uMsg)
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bool done = false; // Bool Variable To Exit Loop
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void WndProc(SDL_Event *event)
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{
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switch (uMsg->type) // Check For Windows Messages
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switch (event->type) // Check For Windows Messages
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{
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case SDL_EVENT_KEY_DOWN: // Is A Key Being Held Down?
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case SDL_EVENT_QUIT: // Have We Received A Quit Message?
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{
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keys[uMsg->key.keysym.scancode] = true; // If So, Mark It As TRUE
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break; // Jump Back
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done = true; // If So done=TRUE
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break;
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}
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case SDL_EVENT_KEY_DOWN: // Is A Key Being Held Down?
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{
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keys[event->key.keysym.scancode] = true; // If So, Mark It As TRUE
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break; // Jump Back
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}
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case SDL_EVENT_KEY_UP: // Has A Key Been Released?
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case SDL_EVENT_KEY_UP: // Has A Key Been Released?
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{
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keys[uMsg->key.keysym.scancode] = false; // If So, Mark It As FALSE
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break; // Jump Back
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keys[event->key.keysym.scancode] = false; // If So, Mark It As FALSE
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break; // Jump Back
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}
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case SDL_EVENT_WINDOW_PIXEL_SIZE_CHANGED: // Resize The OpenGL Window
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case SDL_EVENT_WINDOW_PIXEL_SIZE_CHANGED: // Resize The OpenGL Window
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{
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ReSizeGLScene(uMsg->window.data1, uMsg->window.data2); // LoWord=Width, HiWord=Height
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break; // Jump Back
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ReSizeGLScene(event->window.data1, event->window.data2); // data1=Width, data2=Height
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break; // Jump Back
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}
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default: break;
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}
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}
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int main(int argc, char *argv[])
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{
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SDL_Event msg; // Windows Message Structure
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bool done = false; // Bool Variable To Exit Loop
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SDL_Init(SDL_INIT_VIDEO);
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@@ -478,136 +486,127 @@ int main(int argc, char *argv[])
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while (!done) // Loop That Runs While done=FALSE
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{
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if (SDL_PollEvent(&msg) > 0) // Is There A Message Waiting?
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SDL_Event event; // SDL Event Structure
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while (SDL_PollEvent(&event) > 0) // Is There A Message Waiting?
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{
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if (msg.type == SDL_EVENT_QUIT) // Have We Received A Quit Message?
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WndProc(&event); // Deal with events
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}
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// Draw The Scene. Watch For ESC Key And Quit Messages From DrawGLScene()
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if ((active && !DrawGLScene()) || keys[SDL_SCANCODE_ESCAPE]) // Active? Was There A Quit Received?
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{
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done = true; // ESC or DrawGLScene Signalled A Quit
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break;
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}
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SDL_GL_SwapWindow(win); // Swap Buffers (Double Buffering)
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if (keys[SDL_SCANCODE_B] && !bpressed)
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{
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bpressed = true;
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blend = !blend;
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if (!blend)
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{
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done = true; // If So done=TRUE
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glDisable(GL_BLEND);
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glEnable(GL_DEPTH_TEST);
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}
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else // If Not, Deal With Window Messages
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else
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{
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WndProc(&msg);
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glEnable(GL_BLEND);
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glDisable(GL_DEPTH_TEST);
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}
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}
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else // If There Are No Messages
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if (!keys[SDL_SCANCODE_B])
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{
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// Draw The Scene. Watch For ESC Key And Quit Messages From DrawGLScene()
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if ((active && !DrawGLScene()) || keys[SDL_SCANCODE_ESCAPE]) // Active? Was There A Quit Received?
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bpressed = false;
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}
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if (keys[SDL_SCANCODE_F] && !fpressed)
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{
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fpressed = true;
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filter += 1;
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if (filter > 2)
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{
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done = true; // ESC or DrawGLScene Signalled A Quit
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filter = 0;
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}
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else // Not Time To Quit, Update Screen
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}
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if (!keys[SDL_SCANCODE_F])
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{
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fpressed = false;
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}
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if (keys[SDL_SCANCODE_PAGEUP])
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{
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z -= 0.02f;
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}
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if (keys[SDL_SCANCODE_PAGEDOWN])
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{
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z += 0.02f;
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}
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if (keys[SDL_SCANCODE_UP])
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{
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xpos -= (float)sin(heading * piover180) * 0.05f;
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zpos -= (float)cos(heading * piover180) * 0.05f;
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if (walkbiasangle >= 359.0f)
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{
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SDL_GL_SwapWindow(win); // Swap Buffers (Double Buffering)
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if (keys[SDL_SCANCODE_B] && !bpressed)
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{
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bpressed = true;
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blend = !blend;
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if (!blend)
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{
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glDisable(GL_BLEND);
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glEnable(GL_DEPTH_TEST);
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}
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else
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{
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glEnable(GL_BLEND);
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glDisable(GL_DEPTH_TEST);
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}
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}
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if (!keys[SDL_SCANCODE_B])
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{
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bpressed = false;
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}
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walkbiasangle = 0.0f;
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}
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else
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{
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walkbiasangle += 10;
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}
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walkbias = (float)sin(walkbiasangle * piover180) / 20.0f;
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}
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if (keys[SDL_SCANCODE_F] && !fpressed)
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{
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fpressed = true;
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filter += 1;
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if (filter > 2)
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{
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filter = 0;
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}
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}
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if (!keys[SDL_SCANCODE_F])
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{
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fpressed = false;
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}
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if (keys[SDL_SCANCODE_DOWN])
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{
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xpos += (float)sin(heading*piover180) * 0.05f;
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zpos += (float)cos(heading*piover180) * 0.05f;
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if (walkbiasangle <= 1.0f)
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{
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walkbiasangle = 359.0f;
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}
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else
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{
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walkbiasangle -= 10;
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}
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walkbias = (float)sin(walkbiasangle * piover180) / 20.0f;
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}
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if (keys[SDL_SCANCODE_PAGEUP])
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{
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z -= 0.02f;
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}
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if (keys[SDL_SCANCODE_RIGHT])
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{
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heading -= 1.0f;
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yrot = heading;
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}
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if (keys[SDL_SCANCODE_PAGEDOWN])
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{
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z += 0.02f;
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}
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if (keys[SDL_SCANCODE_LEFT])
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{
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heading += 1.0f;
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yrot = heading;
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}
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if (keys[SDL_SCANCODE_UP])
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{
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if (keys[SDL_SCANCODE_PAGEUP])
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{
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lookupdown -= 1.0f;
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}
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xpos -= (float)sin(heading * piover180) * 0.05f;
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zpos -= (float)cos(heading * piover180) * 0.05f;
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if (walkbiasangle >= 359.0f)
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{
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walkbiasangle = 0.0f;
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}
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else
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{
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walkbiasangle += 10;
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}
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walkbias = (float)sin(walkbiasangle * piover180) / 20.0f;
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}
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if (keys[SDL_SCANCODE_PAGEDOWN])
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{
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lookupdown += 1.0f;
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}
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if (keys[SDL_SCANCODE_DOWN])
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{
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xpos += (float)sin(heading*piover180) * 0.05f;
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zpos += (float)cos(heading*piover180) * 0.05f;
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if (walkbiasangle <= 1.0f)
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{
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walkbiasangle = 359.0f;
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}
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else
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{
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walkbiasangle -= 10;
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}
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walkbias = (float)sin(walkbiasangle * piover180) / 20.0f;
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}
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if (keys[SDL_SCANCODE_RIGHT])
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{
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heading -= 1.0f;
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yrot = heading;
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}
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if (keys[SDL_SCANCODE_LEFT])
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{
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heading += 1.0f;
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yrot = heading;
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}
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if (keys[SDL_SCANCODE_PAGEUP])
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{
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lookupdown -= 1.0f;
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}
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if (keys[SDL_SCANCODE_PAGEDOWN])
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{
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lookupdown += 1.0f;
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}
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if (keys[SDL_SCANCODE_F1]) // Is F1 Being Pressed?
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{
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keys[SDL_SCANCODE_F1] = false; // If So Make Key FALSE
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FreeResources();
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KillGLWindow(); // Kill Our Current Window
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fullscreen = !fullscreen; // Toggle Fullscreen / Windowed Mode
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// Recreate Our OpenGL Window
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if (!CreateGLWindow("Lionel Brits & NeHe's 3D World Tutorial", 640, 480, 16, fullscreen))
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{
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return 0; // Quit If Window Was Not Created
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}
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}
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if (keys[SDL_SCANCODE_F1]) // Is F1 Being Pressed?
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{
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keys[SDL_SCANCODE_F1] = false; // If So Make Key FALSE
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FreeResources();
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KillGLWindow(); // Kill Our Current Window
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fullscreen = !fullscreen; // Toggle Fullscreen / Windowed Mode
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// Recreate Our OpenGL Window
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if (!CreateGLWindow("Lionel Brits & NeHe's 3D World Tutorial", 640, 480, 16, fullscreen))
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{
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return 0; // Quit If Window Was Not Created
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}
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}
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}
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