pyramid: handle multiple keys

1 files changed, 41 insertions, 14 deletions

diff --git a/sdl/pyramid.c b/sdl/pyramid.c
index dd15225..c3301e8 100644
--- a/sdl/pyramid.c
+++ b/sdl/pyramid.c
@@ -85,16 +85,30 @@ static void SetupRC()
     glEnable(GL_TEXTURE_2D);
 }
 
-static void keys(SDL_keysym *keysym)
+static void keys(SDL_keysym *keysym, unsigned int *keys_held, int flag)
 {
-    switch (keysym->sym)
+    if (!flag)
     {
-    case SDLK_ESCAPE: exit(0); break;
-    case SDLK_w: xRot -= 5.0f; break;
-    case SDLK_s: xRot += 5.0f; break;
-    case SDLK_a: yRot -= 5.0f; break;
-    case SDLK_d: yRot += 5.0f; break;
-    default: break;
+        switch (keysym->sym)
+        {
+        case SDLK_ESCAPE: exit(0); break;
+        case SDLK_w: xRot -= 5.0f; break;
+        case SDLK_s: xRot += 5.0f; break;
+        case SDLK_a: yRot -= 5.0f; break;
+        case SDLK_d: yRot += 5.0f; break;
+        default: break;
+        }
+    }
+    else
+    {
+        if (keys_held[SDLK_w])
+            xRot -= 5.0f;
+        if (keys_held[SDLK_s])
+            xRot += 5.0f;
+        if (keys_held[SDLK_a])
+            yRot -= 5.0f;
+        if (keys_held[SDLK_d])
+            yRot += 5.0f;
     }
                 
     xRot = (GLfloat) ((const int) xRot % 360);
@@ -105,23 +119,36 @@ static void keys(SDL_keysym *keysym)
 void processEvents()
 {
     SDL_Event event;
-    unsigned static int m_Keys[SDLK_LAST];
-    SDLKey sym = event.key.keysym.sym;
+    unsigned static int keys_held[323];
+    SDLKey sym;
+    /* helper flag for keys() */
+    int flag = 0;
+    
+    /* check for keys that are being constantly pressed */
+    if (keys_held[SDLK_w] || keys_held[SDLK_s] || keys_held[SDLK_a] || keys_held[SDLK_d])
+    {
+        flag = !flag;
+        keys(NULL, keys_held, flag);
+    }
+    else
+        flag = !flag;
     
     while (SDL_PollEvent(&event))
     {
+        sym = event.key.keysym.sym;
+    
         switch (event.type)
         {
         case SDL_KEYUP:
         {
-            m_Keys[sym] = 0;
-            keys(&event.key.keysym);
+            /* reset the key to 0 */
+            keys_held[sym] = 0;
             break;
         }
         case SDL_KEYDOWN:
         {
-            m_Keys[sym] = 1;
-            keys(&event.key.keysym);
+            keys_held[sym] = 1;
+            keys(&event.key.keysym, keys_held, flag);
             break;
         }
         case SDL_VIDEORESIZE: { resize(event.resize.w, event.resize.h); break; }