124 lines
4.7 KiB
C
124 lines
4.7 KiB
C
/*
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* Portions of this file are copyright Rebirth contributors and licensed as
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* described in COPYING.txt.
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* Portions of this file are copyright Parallax Software and licensed
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* according to the Parallax license below.
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* See COPYING.txt for license details.
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THE COMPUTER CODE CONTAINED HEREIN IS THE SOLE PROPERTY OF PARALLAX
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SOFTWARE CORPORATION ("PARALLAX"). PARALLAX, IN DISTRIBUTING THE CODE TO
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END-USERS, AND SUBJECT TO ALL OF THE TERMS AND CONDITIONS HEREIN, GRANTS A
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ROYALTY-FREE, PERPETUAL LICENSE TO SUCH END-USERS FOR USE BY SUCH END-USERS
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IN USING, DISPLAYING, AND CREATING DERIVATIVE WORKS THEREOF, SO LONG AS
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SUCH USE, DISPLAY OR CREATION IS FOR NON-COMMERCIAL, ROYALTY OR REVENUE
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FREE PURPOSES. IN NO EVENT SHALL THE END-USER USE THE COMPUTER CODE
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CONTAINED HEREIN FOR REVENUE-BEARING PURPOSES. THE END-USER UNDERSTANDS
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AND AGREES TO THE TERMS HEREIN AND ACCEPTS THE SAME BY USE OF THIS FILE.
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COPYRIGHT 1993-1998 PARALLAX SOFTWARE CORPORATION. ALL RIGHTS RESERVED.
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*/
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/*
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* $Source: /cvsroot/dxx-rebirth/d2x-rebirth/include/texmap.h,v $
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* $Revision: 1.1.1.1 $
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* $Author: zicodxx $
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* $Date: 2006/03/17 20:01:30 $
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*
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* Include file for entities using texture mapper library.
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*
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*/
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#ifndef _TEXMAP_H
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#define _TEXMAP_H
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#include "maths.h"
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#include "3d.h"
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#include "gr.h"
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#define NUM_LIGHTING_LEVELS 32
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#define MAX_TMAP_VERTS 25
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#define MAX_LIGHTING_VALUE ((NUM_LIGHTING_LEVELS-1)*F1_0/NUM_LIGHTING_LEVELS)
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#define MIN_LIGHTING_VALUE (F1_0/NUM_LIGHTING_LEVELS)
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#ifdef __cplusplus
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#define FIX_RECIP_TABLE_SIZE 641 //increased from 321 to 641, since this res is now quite achievable.. slight fps boost -MM
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// -------------------------------------------------------------------------------------------------------
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extern fix compute_lighting_value(g3s_point *vertptr);
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// -------------------------------------------------------------------------------------------------------
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// This is the main texture mapper call.
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// tmap_num references a texture map defined in Texmap_ptrs.
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// nverts = number of vertices
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// vertbuf is a pointer to an array of vertex pointers
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extern void draw_tmap(grs_bitmap *bp, int nverts, g3s_point **vertbuf);
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//function that takes the same parms as draw_tmap, but renders as flat poly
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//we need this to do the cloaked effect
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extern void draw_tmap_flat(grs_bitmap *bp,int nverts,g3s_point **vertbuf);
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// -------------------------------------------------------------------------------------------------------
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// Texture map vertex.
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// The fields r,g,b and l are mutually exclusive. r,g,b are used for rgb lighting.
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// l is used for intensity based lighting.
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struct g3ds_vertex {
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fix x,y,z;
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fix u,v;
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fix x2d,y2d;
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fix l;
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fix r,g,b;
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};
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// A texture map is defined as a polygon with u,v coordinates associated with
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// one point in the polygon, and a pair of vectors describing the orientation
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// of the texture map in the world, from which the deltas Du_dx, Dv_dy, etc.
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// are computed.
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struct g3ds_tmap {
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int nv; // number of vertices
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g3ds_vertex verts[MAX_TMAP_VERTS]; // up to 8 vertices, this is inefficient, change
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};
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// -------------------------------------------------------------------------------------------------------
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// Note: Not all interpolation method and lighting combinations are supported.
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// Set Interpolation_method to 0/1/2 for linear/linear, perspective/linear, perspective/perspective
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extern int Interpolation_method;
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// Set Lighting_on to 0/1/2 for no lighting/intensity lighting/rgb lighting
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extern int Lighting_on;
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// HACK INTERFACE: how far away the current segment (& thus texture) is
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extern int Current_seg_depth;
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// These are pointers to texture maps. If you want to render texture map #7, then you will render
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// the texture map defined by Texmap_ptrs[7].
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// Interface for sky renderer
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extern void texture_map_lin_lin_sky(grs_bitmap *srcb, g3ds_tmap *t);
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extern void texture_map_lin_lin_sky_v(grs_bitmap *srcb, g3ds_tmap *t);
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extern void texture_map_hyp_lin_v(grs_bitmap *srcb, g3ds_tmap *t);
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extern void ntexture_map_lighted_linear(grs_bitmap *srcb, g3ds_tmap *t);
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// This is the gr_upoly-like interface to the texture mapper which uses texture-mapper compatible
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// (ie, avoids cracking) edge/delta computation.
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void gr_upoly_tmap(int nverts, const int *vert );
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//This is like gr_upoly_tmap() but instead of drawing, it calls the specified
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//function with ylr values
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void gr_upoly_tmap_ylr(int nverts, const int *vert, void (*ylr_func)(int, fix, fix) );
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extern int Transparency_on,per2_flag;
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extern int Window_clip_left, Window_clip_bot, Window_clip_right, Window_clip_top;
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// for ugly hack put in to be sure we don't overflow render buffer
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#define FIX_XLIMIT (639 * F1_0)
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#define FIX_YLIMIT (479 * F1_0)
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extern void init_interface_vars_to_assembler(void);
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#endif
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#endif
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