Merge pull request #14 from rodri042/replacing-dynamic-cast-with-boolean

Replacing dynamic_cast with boolean for performance reasons

engine/include/libgba-sprite-engine/sprites/sprite.h

@@ -61,6 +61,7 @@ protected:
     u8 animationDelay, numberOfFrames, beginFrame, currentFrame, previousFrame, animationCounter;
     bool animating;
     OBJ_ATTR oam;
+    bool isAffine;
 
     void syncAnimation();
     virtual void syncOam();

engine/src/sprites/affine_sprite.cpp

@@ -13,11 +13,11 @@ void AffineSprite::identity() {
 }
 
 AffineSprite::AffineSprite(const AffineSprite &other) : Sprite(other), affIndex(other.affIndex) {
-
+  isAffine = true;
 }
 
 AffineSprite::AffineSprite(const void *imgData, int imgSize, int xC, int yC, SpriteSize spriteSize)  : Sprite(imgData, imgSize, xC, yC, spriteSize), affIndex(0) {
-
+  isAffine = true;
 }
 
 void AffineSprite::rotate(u16 alpha) {

engine/src/sprites/sprite.cpp

@@ -17,7 +17,7 @@ Sprite::Sprite(const Sprite &other) : Sprite(nullptr, 0, other.x, other.y, other
 }
 
 Sprite::Sprite(const void *imageData, int imageSize, int x, int y, SpriteSize size)
-        : x(x), y(y), data(imageData), imageSize(imageSize), spriteSize(size), priority(0),
+        : x(x), y(y), data(imageData), imageSize(imageSize), spriteSize(size), priority(0), isAffine(false),
           animationDelay(0), numberOfFrames(0), beginFrame(0), currentFrame(0), animationCounter(0) {
     setAttributesBasedOnSize(size);
 }

engine/src/sprites/sprite_manager.cpp

@@ -47,11 +47,10 @@ void SpriteManager::copyOverSpriteOAMToVRAM() {
 
         oam_mem[i] = sprite->oam;
 
-        auto affine = dynamic_cast<AffineSprite*>(sprite);
+        if(sprite->isAffine) {
-        if(affine) {
             // WHY warning: can't do this: obj_aff_mem[affineIndex] = *affineShadow;
             // because that would override OAM also! only want to set non-overlapping affine attribs
-
+            auto affine = static_cast<AffineSprite*>(sprite);
             affine->setTransformationMatrix(&obj_aff_mem[affineIndex]);
             affine->setAffineIndex(affineIndex);
             affineIndex++;