Differential D4570 Diff 19997 source/graphics/Camera.h

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source/graphics/Camera.h

/* Copyright (C) 2021 Wildfire Games.		/* Copyright (C) 2022 Wildfire Games.
* This file is part of 0 A.D.		* This file is part of 0 A.D.
*		*
* 0 A.D. is free software: you can redistribute it and/or modify		* 0 A.D. is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by		* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 2 of the License, or		* the Free Software Foundation, either version 2 of the License, or
* (at your option) any later version.		* (at your option) any later version.
*		*
* 0 A.D. is distributed in the hope that it will be useful,		* 0 A.D. is distributed in the hope that it will be useful,
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*/		*/

#ifndef INCLUDED_CAMERA		#ifndef INCLUDED_CAMERA
#define INCLUDED_CAMERA		#define INCLUDED_CAMERA

#include "maths/BoundingBoxAligned.h"		#include "maths/BoundingBoxAligned.h"
#include "maths/Frustum.h"		#include "maths/Frustum.h"
#include "maths/Matrix3D.h"		#include "maths/Matrix3D.h"
		#include "maths/Vector2D.h"

#include <array>		#include <array>

// view port		// view port
struct SViewPort		struct SViewPort
{		{
int m_X;		int m_X;
int m_Y;		int m_Y;
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float GetAspectRatio() const;		float GetAspectRatio() const;

float GetNearPlane() const { return m_NearPlane; }		float GetNearPlane() const { return m_NearPlane; }
float GetFarPlane() const { return m_FarPlane; }		float GetFarPlane() const { return m_FarPlane; }
float GetFOV() const { return m_FOV; }		float GetFOV() const { return m_FOV; }
float GetOrthoScale() const { return m_OrthoScale; }		float GetOrthoScale() const { return m_OrthoScale; }

// Returns a quad of view in camera space at given distance from camera.		// Returns a quad of view in camera space at given distance from camera.
void GetViewQuad(float dist, Quad& quad) const;		Quad GetViewQuad(float dist) const;

// Builds a ray passing through the screen coordinate (px, py), calculates		// Builds a ray passing through the screen coordinate (px, py), calculates
// origin and direction of the ray.		// origin and direction of the ray.
void BuildCameraRay(int px, int py, CVector3D& origin, CVector3D& dir) const;		std::tuple<CVector3D, CVector3D> BuildCameraRay(int px, int py) const;

// General helpers that seem to fit here		// General helpers that seem to fit here

// Get the screen-space coordinates corresponding to a given world-space position		// Get the screen-space coordinates corresponding to a given world-space position
void GetScreenCoordinates(const CVector3D& world, float& x, float& y) const;		CVector2D GetScreenCoordinates(const CVector3D& world) const;

// Get the point on the terrain corresponding to pixel (px,py) (or the mouse coordinates)		// Get the point on the terrain corresponding to pixel (px,py) (or the mouse coordinates)
// The aboveWater parameter determines whether we want to stop at the water plane or also get underwater points		// The aboveWater parameter determines whether we want to stop at the water plane or also get underwater points
CVector3D GetWorldCoordinates(int px, int py, bool aboveWater=false) const;		CVector3D GetWorldCoordinates(int px, int py, bool aboveWater=false) const;
// Get the point on the plane at height h corresponding to pixel (px,py)		// Get the point on the plane at height h corresponding to pixel (px,py)
CVector3D GetWorldCoordinates(int px, int py, float h) const;		CVector3D GetWorldCoordinates(int px, int py, float h) const;
// Get the point on the terrain (or water plane) the camera is pointing towards		// Get the point on the terrain (or water plane) the camera is pointing towards
CVector3D GetFocus() const;		CVector3D GetFocus() const;
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