CollisionDetection.h

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#pragma once
 
#include <array>
 
#include <tdme/tdme.h>
#include <tdme/engine/physics/fwd-tdme.h>
#include <tdme/engine/primitives/fwd-tdme.h>
#include <tdme/engine/primitives/BoundingBox.h>
#include <tdme/math/fwd-tdme.h>
#include <tdme/math/Vector3.h>
 
using tdme::engine::primitives::BoundingBox;
 
/**
 * Collision detection
 * @author Andreas Drewke
 */
class tdme::engine::physics::CollisionDetection final
{
public:
 
    /**
     * Returns if axis aligned bounding boxes do collide
     * Will not provide hit points
     * @param b1 axis aligned bounding box 1
     * @param b2 axis aligned bounding box 2
     * @return collision
     */
    inline static bool doCollideAABBvsAABBFast(BoundingBox* b1, BoundingBox* b2) {
        // see
        //      http://www.gamedev.net/topic/567310-platform-game-collision-detection/
        const auto& b1Min = b1->getMin();
        const auto& b1Max = b1->getMax();
        const auto& b2Min = b2->getMin();
        const auto& b2Max = b2->getMax();
 
        // face distances
        if (b2Max[0] - b1Min[0] < 0.0f) return false; // b2 collides into b1 on x
        if (b2Max[1] - b1Min[1] < 0.0f) return false; // b2 collides into b1 on y
        if (b2Max[2] - b1Min[2] < 0.0f) return false; // b2 collides into b1 on z
        if (b1Max[0] - b2Min[0] < 0.0f) return false; // b1 collides into b2 on x
        if (b1Max[1] - b2Min[1] < 0.0f) return false; // b1 collides into b2 on y
        if (b1Max[2] - b2Min[2] < 0.0f) return false; // b1 collides into b2 on z
 
        // yarrr
        return true;
    }
 
};