102 lines
3.1 KiB
C
102 lines
3.1 KiB
C
|
#pragma once
|
||
|
|
|
||
|
|
// Copyright (c) 2019 Lawnjelly
|
||
|
|
|
||
|
|
// Permission is hereby granted, free of charge, to any person obtaining a copy
|
||
|
|
// of this software and associated documentation files (the "Software"), to deal
|
||
|
|
// in the Software without restriction, including without limitation the rights
|
||
|
|
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
||
|
|
// copies of the Software, and to permit persons to whom the Software is
|
||
|
|
// furnished to do so, subject to the following conditions:
|
||
|
|
|
||
|
|
// The above copyright notice and this permission notice shall be included in all
|
||
|
|
// copies or substantial portions of the Software.
|
||
|
|
|
||
|
|
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
||
|
|
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
||
|
|
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
||
|
|
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
||
|
|
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
||
|
|
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
|
||
|
|
// SOFTWARE.
|
||
|
|
|
||
|
|
//#define LMAINCAMERA_CALC_LUT
|
||
|
|
|
||
|
|
// we get the main camera clipping planes and derive the points from 3 plane equations
|
||
|
|
// in order to cull shadow casters to the camera frustum
|
||
|
|
class LMainCamera
|
||
|
|
{
|
||
|
|
public:
|
||
|
|
// same order as godot
|
||
|
|
enum ePlane {
|
||
|
|
P_NEAR,
|
||
|
|
P_FAR,
|
||
|
|
P_LEFT,
|
||
|
|
P_TOP,
|
||
|
|
P_RIGHT,
|
||
|
|
P_BOTTOM,
|
||
|
|
P_TOTAL,
|
||
|
|
};
|
||
|
|
|
||
|
|
// same order as godot
|
||
|
|
enum ePoint {
|
||
|
|
PT_FAR_LEFT_TOP,
|
||
|
|
PT_FAR_LEFT_BOTTOM,
|
||
|
|
PT_FAR_RIGHT_TOP,
|
||
|
|
PT_FAR_RIGHT_BOTTOM,
|
||
|
|
PT_NEAR_LEFT_TOP,
|
||
|
|
PT_NEAR_LEFT_BOTTOM,
|
||
|
|
PT_NEAR_RIGHT_TOP,
|
||
|
|
PT_NEAR_RIGHT_BOTTOM,
|
||
|
|
};
|
||
|
|
|
||
|
|
static const char * m_szPlanes[];
|
||
|
|
static const char * m_szPoints[];
|
||
|
|
|
||
|
|
// 6 bits, 6 planes
|
||
|
|
enum { NUM_CAM_PLANES = 6,
|
||
|
|
NUM_CAM_POINTS = 8,
|
||
|
|
MAX_CULL_PLANES = 16,
|
||
|
|
LUT_SIZE = 64,
|
||
|
|
};
|
||
|
|
|
||
|
|
// create the LUT
|
||
|
|
LMainCamera();
|
||
|
|
|
||
|
|
bool Prepare(LRoomManager &manager, Camera * pCam);
|
||
|
|
|
||
|
|
// main use of this object, we can create a clipping volume that is a mix of the light frustum and the camera volume
|
||
|
|
bool AddCameraLightPlanes(LRoomManager &manager, const LSource &lsource, LVector<Plane> &planes) const;
|
||
|
|
|
||
|
|
LVector<Plane> m_Planes;
|
||
|
|
LVector<Vector3> m_Points;
|
||
|
|
|
||
|
|
// centre of camera frustum
|
||
|
|
Vector3 m_ptCentre;
|
||
|
|
|
||
|
|
private:
|
||
|
|
bool AddCameraLightPlanes_Directional(LRoomManager &manager, const LSource &lsource, LVector<Plane> &planes) const;
|
||
|
|
String String_PlaneBF(unsigned int BF);
|
||
|
|
|
||
|
|
#ifdef LMAINCAMERA_CALC_LUT
|
||
|
|
void GetNeighbours(ePlane p, ePlane neigh_planes[4]) const;
|
||
|
|
void GetCornersOfPlanes( ePlane _fpPlane0, ePlane _fpPlane1, ePoint _fpRet[2] ) const;
|
||
|
|
void CreateLUT();
|
||
|
|
void CompactLUT_Entry(int n);
|
||
|
|
void DebugPrintLUT();
|
||
|
|
void DebugPrintLUT_AsTable();
|
||
|
|
void AddLUT(int p0, int p1, ePoint pts[2]);
|
||
|
|
void AddLUT_Entry(unsigned int n, ePoint pts[2]);
|
||
|
|
String DebugStringLUT_Entry(const LVector<uint8_t> &entry);
|
||
|
|
String String_LUTEntry(const LVector<uint8_t> &entry);
|
||
|
|
|
||
|
|
// contains a list of points for each combination of plane facing directions
|
||
|
|
LVector<uint8_t> m_LUT[LUT_SIZE];
|
||
|
|
#endif
|
||
|
|
|
||
|
|
// precalculated LUT
|
||
|
|
static uint8_t m_LUT_EntrySizes[LUT_SIZE];
|
||
|
|
static uint8_t m_LUT_Entries[LUT_SIZE][8];
|
||
|
|
};
|
||
|
|
|