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https://github.com/kevinbentley/Descent3.git
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104 lines
2.5 KiB
C
104 lines
2.5 KiB
C
/*
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* Descent 3
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* Copyright (C) 2024 Parallax Software
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef HEMICUBE_H
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#define HEMICUBE_H
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#include "3d.h"
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#include "radiosity.h"
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#include "gr.h"
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struct rad_hemicube
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{
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matrix view_matrix;
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matrix head_matrix;
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vector view_position;
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rad_element *shooting_element;
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rad_surface *shooting_surface;
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grHardwareSurface drawing_surface;
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grViewport *vport;
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int *id_grid;
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float *depth_grid;
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float *top_array;
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float *side_array;
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int ff_res; // Form factor resolution
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int grid_dim; // Hemicube top/side array dimension
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};
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struct hemicube_point
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{
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float sx,sy;
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float z;
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};
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extern rad_hemicube rad_Hemicube;
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extern int Hemicube_resolution;
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// Calculates the form factors for a hemicube
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void CalculateFormFactorsHemiCube ();
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// Initializes the hemicube
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void InitHemicube (int resolution);
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void CloseHemicube ();
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// Clears the Zbuffer hemicube grid
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void ClearHemicubeGrid ();
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// Sets the elements we're shooting from
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void SetElementView(rad_element *ep);
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// Sets the surface we're shooting from
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void SetSurfaceView(rad_surface *ep);
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// Build transformation matrix for our hemicube
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void BuildTransform(vector *nu,vector *nv,vector *nn);
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// Gets our view system ready for drawing
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void StartHemicubeDrawing ();
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// Releases the view system
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void EndHemicubeDrawing (int);
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// Update hemicube view transformation matrix
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void UpdateView( int face_id );
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// Actually draws the projected polygon onto a hemicube face
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void ScanRadiosityPoly (g3Point **pl,int nv,int element_id);
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void DrawRadiosityPoly(int nv,g3Point **pointlist,int id);
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void GetVertexOrdering (hemicube_point *t, int nv, int *vlt, int *vlb, int *vrt, int *vrb,int *bottom_y_ind);
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int PrevIndex(int val,int modulus);
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int NextIndex(int val,int modulus);
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// Sums the delta form factors
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void SumDeltas (float *ff_array,int face_id);
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float GetTopFactor( int row, int col );
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// Get side face cell form factor
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float GetSideFactor( int row, int col );
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#endif
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