2006-03-20 17:12:09 +00:00
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/*
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2014-06-01 17:55:23 +00:00
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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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2006-03-20 17:12:09 +00:00
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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 1993-1999 PARALLAX SOFTWARE CORPORATION. ALL RIGHTS RESERVED.
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*/
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/*
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*
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* Code to render cool external-scene terrain
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*
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*/
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2014-09-28 21:09:27 +00:00
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#include <bitset>
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2006-03-20 17:12:09 +00:00
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "3d.h"
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2012-07-07 18:35:06 +00:00
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#include "dxxerror.h"
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2006-03-20 17:12:09 +00:00
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#include "gr.h"
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#include "texmap.h"
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#include "iff.h"
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#include "u_mem.h"
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#include "inferno.h"
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#include "textures.h"
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#include "object.h"
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#include "endlevel.h"
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#include "fireball.h"
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#include "render.h"
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2012-11-11 22:12:51 +00:00
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#include "terrain.h"
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2006-03-20 17:12:09 +00:00
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2014-08-16 04:15:16 +00:00
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#include "compiler-make_unique.h"
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2006-03-20 17:12:09 +00:00
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#define GRID_MAX_SIZE 64
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#define GRID_SCALE i2f(2*20)
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#define HEIGHT_SCALE f1_0
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2014-09-28 21:09:27 +00:00
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static int grid_w,grid_h;
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2006-03-20 17:12:09 +00:00
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2014-09-28 21:09:27 +00:00
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static ubyte *height_array;
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2014-07-22 03:11:56 +00:00
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static std::unique_ptr<uint8_t[]> light_array;
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2006-03-20 17:12:09 +00:00
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#define HEIGHT(_i,_j) (height_array[(_i)*grid_w+(_j)])
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#define LIGHT(_i,_j) light_array[(_i)*grid_w+(_j)]
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//!!#define HEIGHT(_i,_j) height_array[(grid_h-1-j)*grid_w+(_i)]
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//!!#define LIGHT(_i,_j) light_array[(grid_h-1-j)*grid_w+(_i)]
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#define LIGHTVAL(_i,_j) (((fix) LIGHT(_i,_j))<<8)
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2014-09-28 21:09:27 +00:00
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static grs_bitmap *terrain_bm;
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static int terrain_outline=0;
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static int org_i,org_j;
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2006-03-20 17:12:09 +00:00
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// LINT: adding function prototypes
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2013-09-22 22:26:27 +00:00
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static void build_light_table(void);
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2006-03-20 17:12:09 +00:00
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// ------------------------------------------------------------------------
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2014-09-28 21:09:27 +00:00
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static void draw_cell(int i,int j,g3s_point *p0,g3s_point *p1,g3s_point *p2,g3s_point *p3, int &mine_tiles_drawn)
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2006-03-20 17:12:09 +00:00
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{
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2013-07-27 21:27:51 +00:00
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g3s_point *pointlist[3];
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2006-03-20 17:12:09 +00:00
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pointlist[0] = p0;
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pointlist[1] = p1;
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pointlist[2] = p3;
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2014-09-04 03:02:21 +00:00
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array<g3s_lrgb, 3> lrgb_list1;
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array<g3s_uvl, 3> uvl_list1;
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2011-04-07 20:32:51 +00:00
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lrgb_list1[0].r = lrgb_list1[0].g = lrgb_list1[0].b = uvl_list1[0].l = LIGHTVAL(i,j);
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lrgb_list1[1].r = lrgb_list1[1].g = lrgb_list1[1].b = uvl_list1[1].l = LIGHTVAL(i,j+1);
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lrgb_list1[2].r = lrgb_list1[2].g = lrgb_list1[2].b = uvl_list1[2].l = LIGHTVAL(i+1,j);
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2006-03-20 17:12:09 +00:00
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uvl_list1[0].u = (i)*f1_0/4; uvl_list1[0].v = (j)*f1_0/4;
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uvl_list1[1].u = (i)*f1_0/4; uvl_list1[1].v = (j+1)*f1_0/4;
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uvl_list1[2].u = (i+1)*f1_0/4; uvl_list1[2].v = (j)*f1_0/4;
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2014-09-04 03:02:21 +00:00
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g3_check_and_draw_tmap(pointlist,uvl_list1,lrgb_list1,terrain_bm);
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2006-03-20 17:12:09 +00:00
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if (terrain_outline) {
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int lsave=Lighting_on;
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Lighting_on=0;
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gr_setcolor(BM_XRGB(31,0,0));
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g3_draw_line(pointlist[0],pointlist[1]);
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g3_draw_line(pointlist[2],pointlist[0]);
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Lighting_on=lsave;
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}
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pointlist[0] = p1;
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pointlist[1] = p2;
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2014-09-04 03:02:21 +00:00
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array<g3s_uvl, 3> uvl_list2;
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array<g3s_lrgb, 3> lrgb_list2;
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2011-04-07 20:32:51 +00:00
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lrgb_list2[0].r = lrgb_list2[0].g = lrgb_list2[0].b = uvl_list2[0].l = LIGHTVAL(i,j+1);
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lrgb_list2[1].r = lrgb_list2[1].g = lrgb_list2[1].b = uvl_list2[1].l = LIGHTVAL(i+1,j+1);
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lrgb_list2[2].r = lrgb_list2[2].g = lrgb_list2[2].b = uvl_list2[2].l = LIGHTVAL(i+1,j);
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2006-03-20 17:12:09 +00:00
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uvl_list2[0].u = (i)*f1_0/4; uvl_list2[0].v = (j+1)*f1_0/4;
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uvl_list2[1].u = (i+1)*f1_0/4; uvl_list2[1].v = (j+1)*f1_0/4;
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uvl_list2[2].u = (i+1)*f1_0/4; uvl_list2[2].v = (j)*f1_0/4;
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2014-09-04 03:02:21 +00:00
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g3_check_and_draw_tmap(pointlist,uvl_list2,lrgb_list2,terrain_bm);
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2006-03-20 17:12:09 +00:00
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if (terrain_outline) {
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int lsave=Lighting_on;
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Lighting_on=0;
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gr_setcolor(BM_XRGB(31,0,0));
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g3_draw_line(pointlist[0],pointlist[1]);
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g3_draw_line(pointlist[1],pointlist[2]);
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g3_draw_line(pointlist[2],pointlist[0]);
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Lighting_on=lsave;
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}
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if (i==org_i && j==org_j)
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mine_tiles_drawn |= 1;
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if (i==org_i-1 && j==org_j)
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mine_tiles_drawn |= 2;
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if (i==org_i && j==org_j-1)
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mine_tiles_drawn |= 4;
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if (i==org_i-1 && j==org_j-1)
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mine_tiles_drawn |= 8;
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if (mine_tiles_drawn == 0xf) {
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render_mine(exit_segnum, 0, 0);
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//draw_exit_model();
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mine_tiles_drawn=-1;
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//if (ext_expl_playing)
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// draw_fireball(&external_explosion);
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}
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}
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2014-09-28 21:09:27 +00:00
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struct terrain_y_cache
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{
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static const std::size_t cache_size = 256;
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std::bitset<cache_size> yc_flags;
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array<vms_vector, cache_size> y_cache;
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vms_vector *operator()(uint_fast32_t h);
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};
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2006-03-20 17:12:09 +00:00
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2014-09-28 21:09:27 +00:00
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vms_vector *terrain_y_cache::operator()(uint_fast32_t h)
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2006-03-20 17:12:09 +00:00
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{
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vms_vector *dyp;
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dyp = &y_cache[h];
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if (!yc_flags[h]) {
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vms_vector tv;
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//@@g3_rotate_delta_y(dyp,h*HEIGHT_SCALE);
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vm_vec_copy_scale(&tv,&surface_orient.uvec,h*HEIGHT_SCALE);
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g3_rotate_delta_vec(dyp,&tv);
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yc_flags[h] = 1;
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}
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return dyp;
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}
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2014-09-28 21:09:27 +00:00
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static int im=1;
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2006-03-20 17:12:09 +00:00
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void render_terrain(vms_vector *org_point,int org_2dx,int org_2dy)
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{
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vms_vector delta_i,delta_j; //delta_y;
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g3s_point p,last_p,save_p_low,save_p_high;
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g3s_point last_p2;
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int i,j;
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int low_i,high_i,low_j,high_j;
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int viewer_i,viewer_j;
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vms_vector tv;
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org_i = org_2dy;
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org_j = org_2dx;
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low_i = 0; high_i = grid_w-1;
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low_j = 0; high_j = grid_h-1;
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2014-09-28 21:09:27 +00:00
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vms_vector start_point;
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2006-03-20 17:12:09 +00:00
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//@@start_point.x = org_point->x - GRID_SCALE*(org_i - low_i);
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//@@start_point.z = org_point->z - GRID_SCALE*(org_j - low_j);
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//@@start_point.y = org_point->y;
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2014-09-28 21:09:27 +00:00
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terrain_y_cache get_dy_vec;
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2006-03-20 17:12:09 +00:00
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//Lighting_on = 0;
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Interpolation_method = im;
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vm_vec_copy_scale(&tv,&surface_orient.rvec,GRID_SCALE);
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g3_rotate_delta_vec(&delta_i,&tv);
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vm_vec_copy_scale(&tv,&surface_orient.fvec,GRID_SCALE);
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g3_rotate_delta_vec(&delta_j,&tv);
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vm_vec_scale_add(&start_point,org_point,&surface_orient.rvec,-(org_i - low_i)*GRID_SCALE);
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vm_vec_scale_add2(&start_point,&surface_orient.fvec,-(org_j - low_j)*GRID_SCALE);
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2014-09-28 21:11:45 +00:00
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vm_vec_sub(tv,Viewer->pos,start_point);
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2006-03-20 17:12:09 +00:00
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viewer_i = vm_vec_dot(&tv,&surface_orient.rvec) / GRID_SCALE;
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viewer_j = vm_vec_dot(&tv,&surface_orient.fvec) / GRID_SCALE;
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g3_rotate_point(&last_p,&start_point);
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save_p_low = last_p;
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2014-07-04 04:17:37 +00:00
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g3s_point save_row[GRID_MAX_SIZE]{};
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// Is this needed?
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2006-03-20 17:12:09 +00:00
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for (j=low_j;j<=high_j;j++) {
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g3_add_delta_vec(&save_row[j],&last_p,get_dy_vec(HEIGHT(low_i,j)));
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if (j==high_j)
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save_p_high = last_p;
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else
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g3_add_delta_vec(&last_p,&last_p,&delta_j);
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}
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2014-09-28 21:09:27 +00:00
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int mine_tiles_drawn = 0; //flags to tell if all 4 tiles under mine have drawn
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2006-03-20 17:12:09 +00:00
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for (i=low_i;i<viewer_i;i++) {
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g3_add_delta_vec(&save_p_low,&save_p_low,&delta_i);
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last_p = save_p_low;
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g3_add_delta_vec(&last_p2,&last_p,get_dy_vec(HEIGHT(i+1,low_j)));
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for (j=low_j;j<viewer_j;j++) {
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g3s_point p2;
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g3_add_delta_vec(&p,&last_p,&delta_j);
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g3_add_delta_vec(&p2,&p,get_dy_vec(HEIGHT(i+1,j+1)));
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2014-09-28 21:09:27 +00:00
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draw_cell(i,j,&save_row[j],&save_row[j+1],&p2,&last_p2,mine_tiles_drawn);
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2006-03-20 17:12:09 +00:00
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last_p = p;
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save_row[j] = last_p2;
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last_p2 = p2;
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}
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2014-09-28 21:09:37 +00:00
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vm_vec_negate(delta_j); //don't have a delta sub...
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2006-03-20 17:12:09 +00:00
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g3_add_delta_vec(&save_p_high,&save_p_high,&delta_i);
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last_p = save_p_high;
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g3_add_delta_vec(&last_p2,&last_p,get_dy_vec(HEIGHT(i+1,high_j)));
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for (j=high_j-1;j>=viewer_j;j--) {
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g3s_point p2;
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g3_add_delta_vec(&p,&last_p,&delta_j);
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g3_add_delta_vec(&p2,&p,get_dy_vec(HEIGHT(i+1,j)));
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2014-09-28 21:09:27 +00:00
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draw_cell(i,j,&save_row[j],&save_row[j+1],&last_p2,&p2,mine_tiles_drawn);
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2006-03-20 17:12:09 +00:00
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last_p = p;
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save_row[j+1] = last_p2;
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last_p2 = p2;
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}
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save_row[j+1] = last_p2;
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2014-09-28 21:09:37 +00:00
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vm_vec_negate(delta_j); //restore sign of j
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2006-03-20 17:12:09 +00:00
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}
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//now do i from other end
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2014-09-28 21:09:37 +00:00
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vm_vec_negate(delta_i); //going the other way now...
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2006-03-20 17:12:09 +00:00
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//@@start_point.x += (high_i-low_i)*GRID_SCALE;
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vm_vec_scale_add2(&start_point,&surface_orient.rvec,(high_i-low_i)*GRID_SCALE);
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g3_rotate_point(&last_p,&start_point);
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save_p_low = last_p;
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for (j=low_j;j<=high_j;j++) {
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g3_add_delta_vec(&save_row[j],&last_p,get_dy_vec(HEIGHT(high_i,j)));
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if (j==high_j)
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save_p_high = last_p;
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else
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g3_add_delta_vec(&last_p,&last_p,&delta_j);
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}
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|
|
for (i=high_i-1;i>=viewer_i;i--) {
|
|
|
|
|
|
|
|
g3_add_delta_vec(&save_p_low,&save_p_low,&delta_i);
|
|
|
|
last_p = save_p_low;
|
|
|
|
g3_add_delta_vec(&last_p2,&last_p,get_dy_vec(HEIGHT(i,low_j)));
|
|
|
|
|
|
|
|
for (j=low_j;j<viewer_j;j++) {
|
|
|
|
g3s_point p2;
|
|
|
|
|
|
|
|
g3_add_delta_vec(&p,&last_p,&delta_j);
|
|
|
|
g3_add_delta_vec(&p2,&p,get_dy_vec(HEIGHT(i,j+1)));
|
|
|
|
|
2014-09-28 21:09:27 +00:00
|
|
|
draw_cell(i,j,&last_p2,&p2,&save_row[j+1],&save_row[j],mine_tiles_drawn);
|
2006-03-20 17:12:09 +00:00
|
|
|
|
|
|
|
last_p = p;
|
|
|
|
save_row[j] = last_p2;
|
|
|
|
last_p2 = p2;
|
|
|
|
|
|
|
|
}
|
|
|
|
|
2014-09-28 21:09:37 +00:00
|
|
|
vm_vec_negate(delta_j); //don't have a delta sub...
|
2006-03-20 17:12:09 +00:00
|
|
|
|
|
|
|
g3_add_delta_vec(&save_p_high,&save_p_high,&delta_i);
|
|
|
|
last_p = save_p_high;
|
|
|
|
g3_add_delta_vec(&last_p2,&last_p,get_dy_vec(HEIGHT(i,high_j)));
|
|
|
|
|
|
|
|
for (j=high_j-1;j>=viewer_j;j--) {
|
|
|
|
g3s_point p2;
|
|
|
|
|
|
|
|
g3_add_delta_vec(&p,&last_p,&delta_j);
|
|
|
|
g3_add_delta_vec(&p2,&p,get_dy_vec(HEIGHT(i,j)));
|
|
|
|
|
2014-09-28 21:09:27 +00:00
|
|
|
draw_cell(i,j,&p2,&last_p2,&save_row[j+1],&save_row[j],mine_tiles_drawn);
|
2006-03-20 17:12:09 +00:00
|
|
|
|
|
|
|
last_p = p;
|
|
|
|
save_row[j+1] = last_p2;
|
|
|
|
last_p2 = p2;
|
|
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
save_row[j+1] = last_p2;
|
|
|
|
|
2014-09-28 21:09:37 +00:00
|
|
|
vm_vec_negate(delta_j); //restore sign of j
|
2006-03-20 17:12:09 +00:00
|
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
void free_height_array()
|
|
|
|
{
|
2008-11-14 16:56:40 +00:00
|
|
|
if (height_array)
|
|
|
|
d_free(height_array);
|
2006-03-20 17:12:09 +00:00
|
|
|
}
|
|
|
|
|
2012-11-11 22:12:51 +00:00
|
|
|
void load_terrain(const char *filename)
|
2006-03-20 17:12:09 +00:00
|
|
|
{
|
|
|
|
grs_bitmap height_bitmap;
|
|
|
|
int iff_error;
|
|
|
|
int i,j;
|
|
|
|
ubyte h,min_h,max_h;
|
|
|
|
|
|
|
|
iff_error = iff_read_bitmap(filename,&height_bitmap,BM_LINEAR,NULL);
|
|
|
|
if (iff_error != IFF_NO_ERROR) {
|
|
|
|
Error("File %s - IFF error: %s",filename,iff_errormsg(iff_error));
|
|
|
|
}
|
|
|
|
|
|
|
|
if (height_array)
|
|
|
|
d_free(height_array);
|
|
|
|
|
|
|
|
grid_w = height_bitmap.bm_w;
|
|
|
|
grid_h = height_bitmap.bm_h;
|
|
|
|
|
|
|
|
Assert(grid_w <= GRID_MAX_SIZE);
|
|
|
|
Assert(grid_h <= GRID_MAX_SIZE);
|
|
|
|
|
|
|
|
height_array = height_bitmap.bm_data;
|
|
|
|
|
|
|
|
max_h=0; min_h=255;
|
|
|
|
for (i=0;i<grid_w;i++)
|
|
|
|
for (j=0;j<grid_h;j++) {
|
|
|
|
|
|
|
|
h = HEIGHT(i,j);
|
|
|
|
|
|
|
|
if (h > max_h)
|
|
|
|
max_h = h;
|
|
|
|
|
|
|
|
if (h < min_h)
|
|
|
|
min_h = h;
|
|
|
|
}
|
|
|
|
|
|
|
|
for (i=0;i<grid_w;i++)
|
|
|
|
for (j=0;j<grid_h;j++)
|
|
|
|
HEIGHT(i,j) -= min_h;
|
|
|
|
|
|
|
|
|
|
|
|
// d_free(height_bitmap.bm_data);
|
|
|
|
|
|
|
|
terrain_bm = terrain_bitmap;
|
|
|
|
|
|
|
|
build_light_table();
|
|
|
|
}
|
|
|
|
|
|
|
|
|
2013-10-27 22:00:14 +00:00
|
|
|
static void get_pnt(vms_vector *p,int i,int j)
|
2006-03-20 17:12:09 +00:00
|
|
|
{
|
2009-11-30 22:42:55 +00:00
|
|
|
// added on 02/20/99 by adb to prevent overflow
|
|
|
|
if (i >= grid_h) i = grid_h - 1;
|
|
|
|
if (i == grid_h - 1 && j >= grid_w) j = grid_w - 1;
|
|
|
|
// end additions by adb
|
2006-03-20 17:12:09 +00:00
|
|
|
p->x = GRID_SCALE*i;
|
|
|
|
p->z = GRID_SCALE*j;
|
|
|
|
p->y = HEIGHT(i,j)*HEIGHT_SCALE;
|
|
|
|
}
|
|
|
|
|
2014-08-22 02:27:13 +00:00
|
|
|
static const vms_vector light{0x2e14,0xe8f5,0x5eb8};
|
2006-03-20 17:12:09 +00:00
|
|
|
|
2013-10-27 22:00:14 +00:00
|
|
|
static fix get_face_light(vms_vector *p0,vms_vector *p1,vms_vector *p2)
|
2006-03-20 17:12:09 +00:00
|
|
|
{
|
|
|
|
vms_vector norm;
|
|
|
|
|
|
|
|
vm_vec_normal(&norm,p0,p1,p2);
|
|
|
|
|
|
|
|
return -vm_vec_dot(&norm,&light);
|
|
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
2013-10-27 22:00:14 +00:00
|
|
|
static fix get_avg_light(int i,int j)
|
2006-03-20 17:12:09 +00:00
|
|
|
{
|
|
|
|
vms_vector pp,p[6];
|
|
|
|
fix sum;
|
|
|
|
int f;
|
|
|
|
|
|
|
|
get_pnt(&pp,i,j);
|
|
|
|
get_pnt(&p[0],i-1,j);
|
|
|
|
get_pnt(&p[1],i,j-1);
|
|
|
|
get_pnt(&p[2],i+1,j-1);
|
|
|
|
get_pnt(&p[3],i+1,j);
|
|
|
|
get_pnt(&p[4],i,j+1);
|
|
|
|
get_pnt(&p[5],i-1,j+1);
|
|
|
|
|
|
|
|
for (f=0,sum=0;f<6;f++)
|
|
|
|
sum += get_face_light(&pp,&p[f],&p[(f+1)%5]);
|
|
|
|
|
|
|
|
return sum/6;
|
|
|
|
}
|
|
|
|
|
|
|
|
void free_light_table()
|
|
|
|
{
|
2014-07-22 03:11:56 +00:00
|
|
|
light_array.reset();
|
2006-03-20 17:12:09 +00:00
|
|
|
}
|
|
|
|
|
2013-09-22 22:26:27 +00:00
|
|
|
static void build_light_table()
|
2006-03-20 17:12:09 +00:00
|
|
|
{
|
2014-07-22 03:11:56 +00:00
|
|
|
std::size_t alloc = grid_w*grid_h;
|
2014-08-16 04:15:16 +00:00
|
|
|
light_array = make_unique<uint8_t[]>(alloc);
|
2014-07-22 03:11:56 +00:00
|
|
|
memset(light_array.get(), 0, alloc);
|
2006-03-20 17:12:09 +00:00
|
|
|
int i,j;
|
|
|
|
fix l,l2,min_l=0x7fffffff,max_l=0;
|
|
|
|
for (i=1;i<grid_w;i++)
|
|
|
|
for (j=1;j<grid_h;j++) {
|
|
|
|
l = get_avg_light(i,j);
|
|
|
|
|
|
|
|
if (l > max_l)
|
|
|
|
max_l = l;
|
|
|
|
|
|
|
|
if (l < min_l)
|
|
|
|
min_l = l;
|
|
|
|
}
|
|
|
|
|
|
|
|
for (i=1;i<grid_w;i++)
|
|
|
|
for (j=1;j<grid_h;j++) {
|
|
|
|
|
|
|
|
l = get_avg_light(i,j);
|
|
|
|
|
|
|
|
if (min_l == max_l) {
|
|
|
|
LIGHT(i,j) = l>>8;
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
|
|
|
|
l2 = fixdiv((l-min_l),(max_l-min_l));
|
|
|
|
|
|
|
|
if (l2==f1_0)
|
|
|
|
l2--;
|
|
|
|
|
|
|
|
LIGHT(i,j) = l2>>8;
|
|
|
|
|
|
|
|
}
|
|
|
|
}
|