Rotation!

[rbdr/super-polarity] / src / main.c

diff --git a/src/main.c b/src/main.c
index 602dff33c942b2a89952eb13ee5890e8413c8458..b51a79d2b4066289518b36c00e51bc6a6f059c75 100644 (file)
--- a/src/main.c
+++ b/src/main.c
@@ -8,6 +8,7 @@
 
 #include <stdio.h>
 #include <time.h>
+#include <math.h>
 
 #include "SDL2/SDL.h"
 #include "SDL2_image/SDL_image.h"
@@ -19,7 +20,9 @@
 
 SDL_Window *window;
 SDL_Renderer *renderer;
-SDL_Surface *benHead;
+SDL_Texture *benHead;
+SDL_Rect benRect;
+double angle = 0;
 
 void init () {
     if (SDL_Init(SDL_INIT_VIDEO) < 0) {
@@ -35,25 +38,51 @@ void init () {
     // Set linear quality for scaling, and the "logical" window size.
     SDL_SetHint(SDL_HINT_RENDER_SCALE_QUALITY, "linear");
     SDL_RenderSetLogicalSize(renderer, SCREEN_WIDTH, SCREEN_HEIGHT);
-    
+}
+
+void close () {
+    SDL_DestroyTexture(benHead);
+    SDL_DestroyRenderer(renderer);
+    SDL_DestroyWindow(window);
+    SDL_Quit();
+}
+
+void loadAssets() {
     // Load the surface.
-    // benHead = IMG_Load("data/img/static/ben.png");
+    SDL_Surface *benSurface;
+    benSurface = IMG_Load("data/img/static/ben.png");
+    benHead = SDL_CreateTextureFromSurface(renderer, benSurface);
+    benRect.x = 230;
+    benRect.y = 150;
+    benRect.w = 180;
+    benRect.h = 180;
+    SDL_FreeSurface(benSurface);
 }
 
 void render (SDL_Renderer *renderer) {
     SDL_SetRenderDrawColor(renderer, 255, 255, 255, 255);
     SDL_RenderClear(renderer);
+    SDL_RenderCopyEx(renderer, benHead, NULL, &benRect, angle, NULL, SDL_FLIP_NONE);
     SDL_RenderPresent(renderer);
 }
 
-int mainC(int argc, const char * argv[])
+void update (dt) {
+    angle = (Uint32)(angle + dt / 5) % 360;
+}
+
+int main(int argc, const char * argv[])
 {
     
     // SDL Initialization. TODO: Should have an initializer.
-    Uint32 startFrame;
-    Uint32 endFrame;
+    Uint32 startFrame = 0;
+    Uint32 endFrame = 0;
+    Uint32 lastTime = 0;
+    Uint32 dt;
     Uint32 delay;
     int done;
+    
+    init();
+    loadAssets();
    
     
     done = 0;
@@ -61,6 +90,9 @@ int mainC(int argc, const char * argv[])
     // Event Loop.
     while (!done) {
         startFrame = SDL_GetTicks();
+        dt = startFrame - lastTime;
+        lastTime = startFrame;
+        
         SDL_Event event;
         while (SDL_PollEvent(&event)) {
             if (event.type == SDL_QUIT) {
@@ -68,6 +100,7 @@ int mainC(int argc, const char * argv[])
             }
         }
         
+        update(dt);
         render(renderer);
         
         endFrame = SDL_GetTicks();
@@ -80,7 +113,7 @@ int mainC(int argc, const char * argv[])
         SDL_Delay(delay);
     }
     
-    SDL_Quit();
+    close();
 
     return 0;
 }