PickupGeometry.hpp

Go to the documentation of this file.

 
#pragma once
 
#include <cmath>
#include <glm/glm.hpp>
#include <glm/gtc/constants.hpp>
 
namespace systems
{

constexpr float k_pickupRange = 140.0f;

inline const glm::vec3 k_weaponPickupHalfExtents{32.0f, 32.0f, 32.0f};

constexpr float k_pickupMaxAngleDeg = 12.0f;

inline const float k_pickupMinDot = std::cos(glm::radians(k_pickupMaxAngleDeg));

inline bool overlapsAABB(glm::vec3 aPos, glm::vec3 aHalf, glm::vec3 bPos, glm::vec3 bHalf)
{
    return std::abs(aPos.x - bPos.x) <= (aHalf.x + bHalf.x) && std::abs(aPos.y - bPos.y) <= (aHalf.y + bHalf.y) &&
           std::abs(aPos.z - bPos.z) <= (aHalf.z + bHalf.z);
}

inline glm::vec3 viewForward(float yaw, float pitch)
{
    const float cp = std::cos(pitch);
    return glm::normalize(glm::vec3{
        std::sin(yaw) * cp,
        -std::sin(pitch),
        std::cos(yaw) * cp,
    });
}

inline bool isPlayerLookingAtPickup(glm::vec3 eye, glm::vec3 viewFwd, glm::vec3 pickupPos)
{
    const glm::vec3 toPickup = pickupPos - eye;
    const float distSq = glm::dot(toPickup, toPickup);
    if (distSq > k_pickupRange * k_pickupRange || distSq <= 0.0001f)
        return false;
    return glm::dot(viewFwd, glm::normalize(toPickup)) >= k_pickupMinDot;
}
 
} // namespace systems