X-Git-Url: https://git.ucc.asn.au/?a=blobdiff_plain;f=course%2Fsemester2%2Fpprog%2Fassignment0%2Fgraphics.c;fp=course%2Fsemester2%2Fpprog%2Fassignment0%2Fgraphics.c;h=cf2bf12ff6ef371689250951e7fa32ed54cf0379;hb=c37245b967333688ad4c2bd842e7ab5ff4d0b8ec;hp=747e39914f0011782d2c15c261cb8ae9ff5e7a5c;hpb=d4f132d40be6b93d54edca1e9af4051ec6c2d0b8;p=matches%2Fhonours.git

diff --git a/course/semester2/pprog/assignment0/graphics.c b/course/semester2/pprog/assignment0/graphics.c
index 747e3991..cf2bf12f 100644
--- 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);
+}
+