40 lines
1.1 KiB
C++
40 lines
1.1 KiB
C++
#ifndef BALL_H
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#define BALL_H
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#include "GraphicsObject.h"
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//#include "PhysicsObject.h"
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class Ball : public GraphicsObject
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{
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public:
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Ball() : GraphicsObject(&Ball::SetX, this) // pointer to self (specific instance)
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{
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instance_num = ++instance_counter;
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// NOTE(dev): don't go above 100, please, for the sake of the example.
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}
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int GetXFromPhysicsSimulation()
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{
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// NOTE(dev): move around by 100 to show that the number is different each time,
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// but keep the instance number to show you're on the same one.
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// NOTE(dev): THIS IS THE CODE that proves that the graphics object does not
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// call on the physics system to determind its location.
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return instance_num + ((rand() % 10) * 100);
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}
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static void SetX(int &x, void *instance)
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{
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Ball *ball = static_cast<Ball*>(instance);
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// NOTE(dev): This could easily be physics_system->GetX(this->physics_lookup_id)
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// and GraphicsObject would never have to know about it.
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x = ball->GetXFromPhysicsSimulation();
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return;
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}
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private:
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static int instance_counter;
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int instance_num;
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};
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int Ball::instance_counter = 0;
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#endif
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