added rest of basics in TSE_Core

TSE_Core/src/elements/TileSet.cpp

@@ -0,0 +1,35 @@
+#include "TileSet.hpp"
+#include "Debug.hpp"
+
+#define PADDING 0.0f
+
+TSE::TileSet::TileSet(Texture *tex, int x, int y)
+{
+    SetTexture(tex);
+    SetCount(x,y);
+}
+
+void TSE::TileSet::SetCount(int x, int y)
+{
+    resx = x;
+    resy = y;
+}
+
+void TSE::TileSet::SetTexture(Texture *tex)
+{
+    this->tex = tex;
+}
+
+void TSE::TileSet::GetSpriteAt(int x, int y, Sprite &s)
+{
+    if(x < 0 || x >= resx || y < 0 || y >= resy)
+    {
+        TSE_ERROR("The sprite you are trying to access is out of range");
+        return;
+    }
+
+    Vector2 startpos = Vector2(((tex->size().x / resx) * (x + PADDING)) / tex->size().x, ((tex->size().y / resy) * (y + PADDING)) / tex->size().y);
+    Vector2 endpos = Vector2(((tex->size().x / resx) * ((x + 1) - PADDING)) / tex->size().x, ((tex->size().y / resy) * ((y + 1) - PADDING)) / tex->size().y);
+
+    s = Sprite(tex, Rect(startpos, endpos));
+}