mirror of
https://github.com/OpenTrespasser/JurassicParkTrespasser.git
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213 lines
6.5 KiB
C++
213 lines
6.5 KiB
C++
/***********************************************************************************************
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*
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* Copyright © DreamWorks Interactive. 1996
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*
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* Contents:
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* Primitive to "draw" interpolated normals onto a pre-existing bumpmap.
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*
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* Bugs:
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*
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* Notes:
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* This code works in exactly the same fashion as any other of the rendering primitives,
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* except that the Z-buffer is not implemented.
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*
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* To do:
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* Add a faster function for rotating one normal by another normal.
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*
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***********************************************************************************************
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*
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* $Log:: /JP2_PC/Source/Lib/Renderer/Primitives/LineBumpMake.hpp $
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*
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* 35 98.03.07 7:40p Mmouni
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* Removed DrawSubTriangle routine.
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*
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* 34 98/03/04 2:12p Mmouni
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* Made the DrawSubTriangle routine draw an extra pixel in x and y to reduce the number of
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* non-drawn pixels in curved bump-maps.
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*
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* 33 97/11/08 3:41p Pkeet
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* Removed Z template parameters and code.
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*
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* 32 97.10.15 7:41p Mmouni
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* Removed support for right to left scanlines.
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*
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* 31 97/10/12 20:42 Speter
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* Changed rv_face to cv_face.
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*
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* 30 97/08/07 11:35a Pkeet
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* Added interface support for mipmapping.
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*
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* 29 97/07/18 3:30p Pkeet
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* Removed use of the 'b_right' parameter from DrawSubTriangle.
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*
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* 28 97/07/16 15:51 Speter
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* InitializeTriangleData now takes two params to use as coefficients in derivative calculation
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* rather than f_invdx.
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*
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* 27 97/07/07 14:03 Speter
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* Now copy vertices for current polygon locally to arvRasterVertices, which is used rather than
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* rpoly.paprvPolyVertices for most DrawPolygon code. Renamed iY to iYScr, as it's now a union
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* with v3Cam, and set in InitializePolygonData.
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*
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* 26 97/06/27 15:29 Speter
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* Changed CGouraudOff to new CGouraudNone where appropriate. Added bIsPlanar() function.
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*
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* 25 6/16/97 8:36p Mlange
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* Updated for fixed::fxFromFloat() name change.
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*
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* 24 97/05/25 18:05 Speter
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* Changed CDrawTriangle to CDrawPolygon.
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*
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* 23 97-05-06 15:53 Speter
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* Now store bump curves using optimised axis-swap bump transform
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*
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* 22 97-03-31 22:25 Speter
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* Now use CEdge<> line variables rather than slower pointers.
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* Due to this, copied necessary code from parent class Initialize() and InitializeAsBaseEdge();
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* can't call parent's versions, because they have a different idea of what CEdge<LINE> looks
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* like.
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* Changed CZBufferInv parameter to CZBufferOff.
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*
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* 21 97/03/18 19:22 Speter
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* Replaced inefficient CDir3<>('z') with d3ZAxis.
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*
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* 20 97/02/20 8:15p Pkeet
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* Fixed bug found on an assert fail when loaded a curved bumpmapped object.
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*
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* 19 97/02/20 8:00p Pkeet
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* Added a specialized version of 'DrawSubtriangle.'
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*
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* 18 97/02/07 19:11 Speter
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* Replaced r3ObjToTexture with faster, better mx3ObjToTexture, propagated change.
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*
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* 17 1/29/97 12:17p Pkeet
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* Added code for using object space for bumpmap normals.
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*
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* 16 1/15/97 1:05p Pkeet
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* Removed the fog template parameter.
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*
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* 15 97/01/07 12:05 Speter
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* Updated for ptr_const.
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*
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* 14 96/12/31 17:06 Speter
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* Changed template parameter from raster to pixel type.
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* Updated for rptr.
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*
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* 13 12/16/96 7:52p Pkeet
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* Fixed bug.
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*
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* 12 12/16/96 6:43p Pkeet
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* Quick bumpmap fix.
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*
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* 11 12/06/96 5:14p Pkeet
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* Commented out seperate left and right drawing routines.
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*
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* 10 11/12/96 2:46p Pkeet
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* Added support for initializing self-modifying code on a per-triangle basis.
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*
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* 9 96/11/11 18:53 Speter
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* Updated for new CBumpAnglePair.SetBump() function.
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*
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* 8 10/14/96 11:46a Pkeet
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* Added a template parameter for the CMap template parameter.
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*
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* 7 10/09/96 7:32p Pkeet
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* Changed class to use the new 'CScanline' base class.
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*
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* 6 10/04/96 3:51p Pkeet
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* Added the CZBuffer class as a template parameter to CScanline.
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*
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* 5 10/03/96 6:18p Pkeet
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* Added the 'pdpixGetClut' member function.
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*
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* 4 10/02/96 4:40p Pkeet
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* Added the 'INDEX' template parameter. Added full template parameter list to 'CScanline.'
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*
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* 3 9/27/96 4:32p Pkeet
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* Removed the 'LineGouraudZ' template class.
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*
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* 2 96/09/27 11:31 Speter
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* Oops. Changed <float> in geometry types to <>.
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*
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* 1 9/18/96 2:45p Pkeet
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* Initial implementation.
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*
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**********************************************************************************************/
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// Make sure this file is being included after 'FastBump.hpp.'
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#ifndef HEADER_LIB_RENDERER_PRIMITIVES_FASTBUMP_HPP
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#error The header file FastBump.hpp has not been included!
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#endif
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#ifndef HEADER_LIB_RENDERER_PRIMITIVES_LINEBUMPMAKE_HPP
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#define HEADER_LIB_RENDERER_PRIMITIVES_LINEBUMPMAKE_HPP
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#include "Lib/Renderer/Primitives/DrawTriangle.hpp"
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#include "Lib/Renderer/Primitives/Scanline.hpp"
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//
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// Static global variables.
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//
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CVector3<> vec3DeltaX; // Vector increment for one step along the horizontal axis.
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//*****************************************************************************************
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//
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template<class PIXELFORMAT> void DrawLoopBumpMake
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(
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int i_pixel, // Offset into the destination raster.
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PIXELFORMAT* ptpix_screen, // Address of the first screen surface pixel.
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CVector3<> vec3 // Starting vector for interpolation.
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)
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//
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// Scanline draw function draws left to right or right to left depending on
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// i4ScanlineDirection. Version specific to bumpmap angle pairs.
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//
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// Notes:
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// This function is the inner scanline loop for the raster routine.
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//
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//**************************************
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{
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//
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// Iterate left or right along the destination scanline depending on the sign of
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// 'i4ScanlineDirection.'
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//
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do
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{
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//
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// Do nothing if curvature already added. This allows multiple triangles to modify
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// an existing bumpmap without creating artifacts.
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//
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if (!ptpix_screen[i_pixel].bGetCurveFlag())
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{
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//
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// Get normals for the interpolated curve and the existing bumpmap normal.
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//
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CDir3<> dir3_curve(vec3);
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CDir3<> dir3_bump = ptpix_screen[i_pixel].dir3MakeNormal();
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// Rotate the bumpmap normal by the interpolated curve's normal.
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dir3_bump = dir3_bump * CRotate3<>(d3ZAxis, dir3_curve);
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// Reverse the transformation.
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dir3_bump *= CBumpMap::mx3Reverse;
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// Store the combined curvature and bump.
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ptpix_screen[i_pixel].SetBump(dir3_bump);
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// Mark this pixel as already having curvature.
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ptpix_screen[i_pixel].SetCurveFlag();
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}
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// Increment vector and scanline count.
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vec3 += vec3DeltaX;
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i_pixel++;
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}
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while (i_pixel != 0);
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}
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#endif // ifndef HEADER_LIB_RENDERER_PRIMITIVES_LINEBUMPMAKE_HPP
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