Basic acceleration for Actor.

src/Actor.cpp

@@ -7,11 +7,19 @@ Actor::Actor(){
     this->width = 0;
     this->height = 0;
     this->velocity = 0;
+    this->maxVelocity = 0;
+    this->acceleration = 0;
     this->name = "unknown";
 }
 
 
 void Actor::move(float elapsedMs) {
+    //acceleration
+    this->velocity *= this->acceleration;
+
+    if (this->velocity > this->maxVelocity) {
+        this->velocity = this->maxVelocity;
+    }
 
     float elapsedSec = elapsedMs / 1000;
     float move = this->velocity * elapsedSec;

src/Actor.h

@@ -12,6 +12,8 @@ class Actor {
         int height;
 
         int velocity; //in pixels per second
+        int maxVelocity;
+        float acceleration;
 
         std::string name;
 

src/main.cpp

@@ -20,7 +20,9 @@ int main( int argc, char* args[] )
     hero->height = 158;
     hero->x = 0;
     hero->y = (WINDOW_HEIGHT/2) - hero->height/2;
-    hero->velocity = 100;
+    hero->velocity = 10;
+    hero->maxVelocity = 300;
+    hero->acceleration = 1.2;
 
     Sdl2Renderer * renderer = new Sdl2Renderer("Incrementalist step 2", WINDOW_WIDTH, WINDOW_HEIGHT);