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/**********************************************************************************************
*
* [physac] raylib physics module - Basic functions to apply physics to 2D objects
*
* Copyright (c) 2016 Victor Fisac and Ramon Santamaria
*
* This software is provided "as-is", without any express or implied warranty. In no event
* will the authors be held liable for any damages arising from the use of this software.
*
* Permission is granted to anyone to use this software for any purpose, including commercial
* applications, and to alter it and redistribute it freely, subject to the following restrictions:
*
* 1. The origin of this software must not be misrepresented; you must not claim that you
* wrote the original software. If you use this software in a product, an acknowledgment
* in the product documentation would be appreciated but is not required.
*
* 2. Altered source versions must be plainly marked as such, and must not be misrepresented
* as being the original software.
*
* 3. This notice may not be removed or altered from any source distribution.
*
**********************************************************************************************/
#ifndef PHYSAC_H
#define PHYSAC_H
//----------------------------------------------------------------------------------
// Defines and Macros
//----------------------------------------------------------------------------------
// ...
//----------------------------------------------------------------------------------
// Types and Structures Definition
// NOTE: Below types are required for PHYSAC_STANDALONE usage
//----------------------------------------------------------------------------------
// Vector2 type
typedef struct Vector2 {
float x;
float y;
} Vector2;
typedef enum { COLLIDER_CIRCLE, COLLIDER_RECTANGLE } ColliderType;
typedef struct Transform {
Vector2 position;
float rotation; // Radians (not used)
Vector2 scale; // Just for rectangle physic objects, for circle physic objects use collider radius and keep scale as { 0, 0 }
} Transform;
typedef struct Rigidbody {
bool enabled; // Acts as kinematic state (collisions are calculated anyway)
float mass;
Vector2 acceleration;
Vector2 velocity;
bool applyGravity;
bool isGrounded;
float friction; // Normalized value
float bounciness;
} Rigidbody;
typedef struct Collider {
bool enabled;
ColliderType type;
Rectangle bounds; // Used for COLLIDER_RECTANGLE
int radius; // Used for COLLIDER_CIRCLE
} Collider;
typedef struct PhysicObjectData {
unsigned int id;
Transform transform;
Rigidbody rigidbody;
Collider collider;
bool enabled;
} PhysicObjectData, *PhysicObject;
#ifdef __cplusplus
extern "C" { // Prevents name mangling of functions
#endif
//----------------------------------------------------------------------------------
// Module Functions Declaration
//----------------------------------------------------------------------------------
void InitPhysics(Vector2 gravity); // Initializes pointers array (just pointers, fixed size)
void UpdatePhysics(); // Update physic objects, calculating physic behaviours and collisions detection
void ClosePhysics(); // Unitialize all physic objects and empty the objects pool
PhysicObject CreatePhysicObject(Vector2 position, float rotation, Vector2 scale); // Create a new physic object dinamically, initialize it and add to pool
void DestroyPhysicObject(PhysicObject pObj); // Destroy a specific physic object and take it out of the list
void ApplyForce(PhysicObject pObj, Vector2 force); // Apply directional force to a physic object
void ApplyForceAtPosition(Vector2 position, float force, float radius); // Apply radial force to all physic objects in range
Rectangle TransformToRectangle(Transform transform); // Convert Transform data type to Rectangle (position and scale)
void DrawPhysicObjectInfo(PhysicObject pObj, Vector2 position, int fontSize); // Draw physic object information at screen position
#ifdef __cplusplus
}
#endif
#endif // PHYSAC_H
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