pprog assigment0 - messing with graphics

[matches/honours.git] / course / semester2 / pprog / assignment0 / graphics.c

diff --git a/course/semester2/pprog/assignment0/graphics.c b/course/semester2/pprog/assignment0/graphics.c
index 747e399..cf2bf12 100644 (file)
--- a/course/semester2/pprog/assignment0/graphics.c
+++ b/course/semester2/pprog/assignment0/graphics.c
@@ -11,6 +11,9 @@
 
 #include <math.h> //For trig functions
 
+static int screen_width = 0; 
+static int screen_height = 0;
+
 /**
  * @function Graphics_Init
  * @purpose Initialise the SDL/OpenGL graphics system
@@ -47,6 +50,9 @@ void Graphics_Init(const char * caption, int w, int h)
        glDisable(GL_DEPTH_TEST);
        SDL_WM_SetCaption(caption, NULL);
 
+
+       screen_width = w; screen_height = h;
+
        atexit(Graphics_Destroy);
 }
 
@@ -168,3 +174,100 @@ void Graphics_Update()
        //SDL_Flip(screen);
 }
 
+/**
+ * @function Process_Events
+ * @purpose Handle any SDL events recieved.
+ */
+void Process_Events()
+{
+       static float view_v[3] = {0,0,0};
+       static float view_speed = 5.0;
+       static float view_scale = 1;
+       SDL_Event event;
+       
+       
+       
+       
+       while (SDL_PollEvent(&event)) 
+       {
+               switch (event.type)
+               {
+                       case SDL_KEYDOWN:
+                               switch (event.key.keysym.sym)
+                               {
+                                       case SDLK_LEFT:
+                                               view_v[0] += view_speed;
+                                               break;
+                                       case SDLK_RIGHT:
+                                               view_v[0] -= view_speed;
+                                               break;
+                                       case SDLK_UP:
+                                               view_v[1] += view_speed;
+                                               break;
+                                       case SDLK_DOWN:
+                                               view_v[1] -= view_speed;
+                                               break;
+                                       case SDLK_i:
+                                               view_v[0] = 0; view_v[1] = 0; view_v[2] = 0;
+                                               view_scale = 1;
+                                               glLoadIdentity();
+                                               break;
+                                       default:
+                                               break;
+                               }
+                               break;
+                       case SDL_KEYUP:
+                               switch (event.key.keysym.sym)
+                               {
+                                       case SDLK_LEFT:
+                                       case SDLK_RIGHT:
+                                               view_v[0] = 0;
+                                               break;
+                                       case SDLK_UP:
+                                       case SDLK_DOWN:
+                                               view_v[1] = 0;
+                                       default:
+                                               break;
+                               }
+                               break;
+
+                       case SDL_MOUSEBUTTONDOWN:
+                       {
+                               int mouse[2];
+                               SDL_GetMouseState(mouse, mouse+1);
+
+                               switch (event.button.button)
+                               {
+                                       case SDL_BUTTON_WHEELUP:
+                                               
+                                               view_scale = 1.05;
+                                               glTranslatef(screen_width/2.0, screen_height/2.0,0.0);
+                                               glScaled(view_scale, view_scale, 1);
+                                               glTranslatef(-screen_width/2.0, -screen_height/2.0, 0.0);
+                                               break;
+                                       case SDL_BUTTON_WHEELDOWN:
+                                               view_scale = 0.95;
+                                               glTranslatef(screen_width/2.0, screen_height/2.0,0.0);
+                                               glScaled(view_scale, view_scale, 1);
+                                               glTranslatef(-screen_width/2.0, -screen_height/2.0, 0.0);
+                                               break;
+                                       default:
+                                               break;
+
+                               }       
+                               
+                               break;
+                       }
+                       case SDL_MOUSEBUTTONUP:
+                               break;
+                       case SDL_QUIT:
+                               exit(EXIT_SUCCESS);
+                               break;
+               }
+       }
+
+       
+       glTranslatef(view_v[0], view_v[1], view_v[2]);
+       //SDL_Delay(1);
+}
+