First commit: moves a simple thing on the screen

1 files changed, 132 insertions, 0 deletions

diff --git a/src/main.cpp b/src/main.cpp
new file mode 100644
index 0000000..422fdc3
--- /dev/null
+++ b/src/main.cpp
@@ -0,0 +1,132 @@
+//Using SDL and standard IO
+#include <SDL2/SDL.h>
+#include <stdio.h>
+#include "texture.h"
+#include "renderer.h"
+#include "window.h"
+#include "timer.h"
+
+#include <chrono>
+#include <thread>
+//void millisleep(Uint32 t){
+//    SDL_Delay(t);
+//}
+
+//Screen dimension constants
+const int SCREEN_WIDTH = 640;
+const int SCREEN_HEIGHT = 480;
+const int WALKING_ANIMATION_FRAMES = 7;
+
+void loop( Renderer &renderer, Texture &gSpriteSheetTexture, SDL_Rect* gSpriteClips, Uint32 dt){
+    static int frame;
+
+    renderer.clear();
+    SDL_Rect* currentClip = &gSpriteClips[ frame / WALKING_ANIMATION_FRAMES ];
+
+
+    // Txanpona mugitu:
+    float vx = 100; // px/s
+    static float xpos0;
+    float xpos = xpos0 + dt/1000.f * vx;
+    xpos0 = xpos;
+
+    float g = 75; // px/(s^2)
+    static float vy0 = 100; // px/s
+    static float ypos0;
+    float vy = vy0 -(dt/1000.f * g) ;
+    float ypos = ypos0 + dt/1000.f * vy;
+    ypos0 = ypos;
+    vy0 = vy;
+    if ( ypos0 < 0 ) { ypos0 = 0; }
+    if ( ypos < 0 ) { ypos = 0; }
+
+    gSpriteSheetTexture.render(xpos, (SCREEN_HEIGHT/2 -20) - ypos, currentClip);
+
+    //Update screen
+    renderer.update();
+    ++frame;
+
+    //Cycle animation
+    if( frame / WALKING_ANIMATION_FRAMES >= WALKING_ANIMATION_FRAMES )
+    {
+        frame = 0;
+    }
+    return;
+
+}
+
+int
+main( int argc, char* args[] ) {
+
+    if( SDL_Init( SDL_INIT_VIDEO ) < 0 )
+    {
+        printf( "SDL could not initialize: %s\n", SDL_GetError() );
+    }
+
+    Window window {"This is the title", SCREEN_WIDTH, SCREEN_HEIGHT};
+    Renderer renderer;
+    renderer.init(window.window());
+    renderer.setScale(2,2);
+
+
+    //The window we'll be rendering to
+    SDL_Rect gSpriteClips[ WALKING_ANIMATION_FRAMES ];
+    Texture gSpriteSheetTexture {renderer.renderer()};
+
+
+    //Load sprite sheet texture
+    if(-1 ==gSpriteSheetTexture.loadFromFile( "assets/money.png" ) )
+    {
+        return -1;
+    }
+    else
+    {
+        for( int i =0; i < WALKING_ANIMATION_FRAMES; i++){
+            //Set sprite clips
+            gSpriteClips[ i ].x = i*16;
+            gSpriteClips[ i ].y =    0;
+            gSpriteClips[ i ].w =   16;
+            gSpriteClips[ i ].h =   16;
+        }
+    }
+
+
+    // BODY
+    ///////////////////////////////////////////////////////////////////////////
+    const Uint32 LOOP_TIME = 20L; // milliseconds
+    Timer timer;
+    timer.start();
+    while( true )
+    {
+        // Handle events
+        SDL_Event e;
+        while( SDL_PollEvent( &e ) != 0 )
+        {
+            //User requests quit
+            window.handleEvent(e);
+            if( e.type == SDL_QUIT ) {
+                return 0;
+            } else if (e.type == SDL_KEYDOWN){
+                switch( e.key.keysym.sym ){
+                    case 'q':
+                        return 0;
+                }
+            }
+        }
+
+        if(window.closed()) return 0;
+        if(!window.focused()) goto next;
+
+
+        // GAME LOOP:
+        loop(renderer, gSpriteSheetTexture, gSpriteClips, timer.elapsed());
+
+        // Loop time calculation:
+    next:
+        timer.restart();
+        timer.waitUntil( LOOP_TIME );
+    }
+
+    SDL_Quit();
+    return 0;
+}