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506 lines
12 KiB
C++
506 lines
12 KiB
C++
/*
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* Copyright (C) Volition, Inc. 1999. All rights reserved.
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*
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* All source code herein is the property of Volition, Inc. You may not sell
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* or otherwise commercially exploit the source or things you created based on the
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* source.
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*
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*/
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#include "graphics/2d.h"
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#include "render/3dinternal.h"
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#include "globalincs/systemvars.h"
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#include "io/key.h"
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#include "cmdline/cmdline.h"
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int Lasers = 1;
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DCF_BOOL( lasers, Lasers )
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/*
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// This works but leaves the effect looking very flat
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float g3_draw_laser_htl(vec3d *p0,float width1,vec3d *p1,float width2, int r, int g, int b, uint tmap_flags)
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{
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vec3d uvec, fvec, rvec, center;
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vm_vec_sub( &fvec, p0, p1 );
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vm_vec_normalize_safe( &fvec );
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vm_vec_avg( ¢er, p0, p1 ); //needed for the return value only
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vm_vec_crossprod(&uvec,&fvec,&Eye_matrix.vec.rvec);
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if(vm_vec_mag_squared(&uvec)==0) uvec.xyz.y = 1.0f; //in case fvec is exactly equal to matrx.rvec, stick some arbitrary value in uvec
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//normalize new perpendicular vector
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vm_vec_normalize(&uvec);
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//now recompute right vector, in case it wasn't entirely perpendiclar
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vm_vec_crossprod(&rvec,&uvec,&fvec);
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// Now have uvec, which is up vector and rvec which is the normal
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// of the face.
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int i;
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vec3d vecs[4];
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vertex pts[4];
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vertex *ptlist[8] =
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{ &pts[3], &pts[2], &pts[1], &pts[0],
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&pts[0], &pts[1], &pts[2], &pts[3]};
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vm_vec_scale_add( &vecs[0], p0, &uvec, width1/2.0f );
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vm_vec_scale_add( &vecs[1], p1, &uvec, width2/2.0f );
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vm_vec_scale_add( &vecs[2], p1, &uvec, -width2/2.0f );
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vm_vec_scale_add( &vecs[3], p0, &uvec, -width1/2.0f );
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for (i=0; i<4; i++ ) {
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g3_transfer_vertex( &pts[i], &vecs[i] );
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}
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ptlist[0]->u = 0.0f;
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ptlist[0]->v = 0.0f;
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ptlist[1]->u = 1.0f;
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ptlist[1]->v = 0.0f;
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ptlist[2]->u = 1.0f;
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ptlist[2]->v = 1.0f;
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ptlist[3]->u = 0.0f;
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ptlist[3]->v = 1.0f;
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ptlist[0]->r = (ubyte)r;
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ptlist[0]->g = (ubyte)g;
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ptlist[0]->b = (ubyte)b;
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ptlist[0]->a = 255;
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ptlist[1]->r = (ubyte)r;
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ptlist[1]->g = (ubyte)g;
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ptlist[1]->b = (ubyte)b;
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ptlist[1]->a = 255;
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ptlist[2]->r = (ubyte)r;
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ptlist[2]->g = (ubyte)g;
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ptlist[2]->b = (ubyte)b;
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ptlist[2]->a = 255;
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ptlist[3]->r = (ubyte)r;
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ptlist[3]->g = (ubyte)g;
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ptlist[3]->b = (ubyte)b;
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ptlist[3]->a = 255;
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gr_tmapper(gr_screen.mode == GR_DIRECT3D ? 8 : 4,
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ptlist,tmap_flags | TMAP_FLAG_RGB | TMAP_FLAG_GOURAUD | TMAP_FLAG_CORRECT);
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return center.xyz.z;
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}
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*/
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float g3_draw_laser_htl(vec3d *p0,float width1,vec3d *p1,float width2, int r, int g, int b, uint tmap_flags)
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{
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width1 *= 0.5f;
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width2 *= 0.5f;
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vec3d uvec, fvec, rvec, center, reye;
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vm_vec_sub( &fvec, p0, p1 );
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vm_vec_normalize_safe( &fvec );
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vm_vec_avg( ¢er, p0, p1 ); //needed for the return value only
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vm_vec_sub(&reye, &Eye_position, ¢er);
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vm_vec_normalize(&reye);
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vm_vec_crossprod(&uvec,&fvec,&reye);
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vm_vec_normalize(&uvec);
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vm_vec_crossprod(&fvec,&uvec,&reye);
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vm_vec_normalize(&fvec);
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// if(vm_vec_mag_squared(&uvec)==0) uvec.xyz.y = 1.0f; //in case fvec is exactly equal to matrx.rvec, stick some arbitrary value in uvec
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//normalize new perpendicular vector
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// vm_vec_normalize(&uvec);
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//now recompute right vector, in case it wasn't entirely perpendiclar
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vm_vec_crossprod(&rvec,&uvec,&fvec);
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// Now have uvec, which is up vector and rvec which is the normal
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// of the face.
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int i;
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vec3d start, end;
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vm_vec_scale_add(&start, p0, &fvec, -width1);
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vm_vec_scale_add(&end, p1, &fvec, width2);
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vec3d vecs[4];
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vertex pts[4];
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vertex *ptlist[8] =
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{ &pts[3], &pts[2], &pts[1], &pts[0],
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&pts[0], &pts[1], &pts[2], &pts[3]};
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vm_vec_scale_add( &vecs[0], &start, &uvec, width1 );
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vm_vec_scale_add( &vecs[1], &end, &uvec, width2 );
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vm_vec_scale_add( &vecs[2], &end, &uvec, -width2 );
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vm_vec_scale_add( &vecs[3], &start, &uvec, -width1 );
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for (i=0; i<4; i++ ) {
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g3_transfer_vertex( &pts[i], &vecs[i] );
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}
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ptlist[0]->u = 0.0f;
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ptlist[0]->v = 0.0f;
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ptlist[1]->u = 1.0f;
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ptlist[1]->v = 0.0f;
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ptlist[2]->u = 1.0f;
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ptlist[2]->v = 1.0f;
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ptlist[3]->u = 0.0f;
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ptlist[3]->v = 1.0f;
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ptlist[0]->r = (ubyte)r;
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ptlist[0]->g = (ubyte)g;
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ptlist[0]->b = (ubyte)b;
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ptlist[0]->a = 255;
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ptlist[1]->r = (ubyte)r;
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ptlist[1]->g = (ubyte)g;
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ptlist[1]->b = (ubyte)b;
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ptlist[1]->a = 255;
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ptlist[2]->r = (ubyte)r;
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ptlist[2]->g = (ubyte)g;
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ptlist[2]->b = (ubyte)b;
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ptlist[2]->a = 255;
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ptlist[3]->r = (ubyte)r;
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ptlist[3]->g = (ubyte)g;
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ptlist[3]->b = (ubyte)b;
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ptlist[3]->a = 255;
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gr_tmapper(4, ptlist,tmap_flags | TMAP_FLAG_RGB | TMAP_FLAG_GOURAUD | TMAP_FLAG_CORRECT);
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return center.xyz.z;
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}
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// This assumes you have already set a color with gr_set_color or gr_set_color_fast
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// and a bitmap with gr_set_bitmap. If it is very far away, it draws the laser
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// as flat-shaded using current color, else textured using current texture.
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// If max_len is > 1.0, then this caps the length to be no longer than max_len pixels.
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float g3_draw_laser(vec3d *headp, float head_width, vec3d *tailp, float tail_width, uint tmap_flags, float max_len )
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{
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if (!Lasers) {
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return 0.0f;
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}
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if ( !Cmdline_nohtl && (tmap_flags & TMAP_HTL_3D_UNLIT) ) {
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return g3_draw_laser_htl(headp, head_width, tailp, tail_width, 255,255,255, tmap_flags | TMAP_HTL_3D_UNLIT);
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}
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float headx, heady, headr, tailx, taily, tailr;
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vertex pt1, pt2;
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float depth;
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int head_on = 0;
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Assert( G3_count == 1 );
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g3_rotate_vertex(&pt1,headp);
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g3_project_vertex(&pt1);
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if (pt1.flags & PF_OVERFLOW)
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return 0.0f;
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g3_rotate_vertex(&pt2,tailp);
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g3_project_vertex(&pt2);
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if (pt2.flags & PF_OVERFLOW)
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return 0.0f;
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if ( (pt1.codes & pt2.codes) != 0 ) {
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// Both off the same side
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return 0.0f;
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}
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headx = pt1.sx;
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heady = pt1.sy;
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headr = (head_width*Matrix_scale.xyz.x*Canv_w2*pt1.sw);
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tailx = pt2.sx;
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taily = pt2.sy;
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tailr = (tail_width*Matrix_scale.xyz.x*Canv_w2*pt2.sw);
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float len_2d = fl_sqrt( (tailx-headx)*(tailx-headx) + (taily-heady)*(taily-heady) );
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// Cap the length if needed.
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if ( (max_len > 1.0f) && (len_2d > max_len) ) {
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float ratio = max_len / len_2d;
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tailx = headx + ( tailx - headx ) * ratio;
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taily = heady + ( taily - heady ) * ratio;
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tailr = headr + ( tailr - headr ) * ratio;
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len_2d = fl_sqrt( (tailx-headx)*(tailx-headx) + (taily-heady)*(taily-heady) );
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}
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depth = (pt1.z+pt2.z)*0.5f;
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float max_r = headr;
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float a;
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if ( tailr > max_r )
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max_r = tailr;
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if ( max_r < 1.0f )
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max_r = 1.0f;
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float mx, my, w, h1,h2;
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if ( len_2d < max_r ) {
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h1 = headr + (max_r-len_2d);
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if ( h1 > max_r ) h1 = max_r;
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h2 = tailr + (max_r-len_2d);
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if ( h2 > max_r ) h2 = max_r;
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len_2d = max_r;
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if ( fl_abs(tailx - headx) > 0.01f ) {
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a = (float)atan2( taily-heady, tailx-headx );
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} else {
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a = 0.0f;
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}
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w = len_2d;
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head_on = 1;
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} else {
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a = atan2_safe( taily-heady, tailx-headx );
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w = len_2d;
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h1 = headr;
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h2 = tailr;
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head_on = 0;
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}
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mx = (tailx+headx)/2.0f;
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my = (taily+heady)/2.0f;
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// gr_set_color(255,0,0);
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// g3_draw_line( &pt1, &pt2 );
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// gr_set_color( 255, 0, 0 );
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// gr_pixel( fl2i(mx),fl2i(my) );
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// Draw box with width 'w' and height 'h' at angle 'a' from horizontal
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// centered around mx, my
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if ( h1 < 1.0f ) h1 = 1.0f;
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if ( h2 < 1.0f ) h2 = 1.0f;
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float sa, ca;
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sa = (float)sin(a);
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ca = (float)cos(a);
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vertex v[4];
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vertex *vertlist[4] = { &v[3], &v[2], &v[1], &v[0] };
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memset(v,0,sizeof(vertex)*4);
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float sw;
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if ( depth < 0.0f ) depth = 0.0f;
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sw = 1.0f / depth;
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v[0].sx = (-w/2.0f)*ca + (-h1/2.0f)*sa + mx;
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v[0].sy = (-w/2.0f)*sa - (-h1/2.0f)*ca + my;
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v[0].z = pt1.z;
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v[0].sw = pt1.sw;
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v[0].u = 0.0f;
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v[0].v = 0.0f;
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v[0].b = 191;
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v[1].sx = (w/2.0f)*ca + (-h2/2.0f)*sa + mx;
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v[1].sy = (w/2.0f)*sa - (-h2/2.0f)*ca + my;
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v[1].z = pt2.z;
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v[1].sw = pt2.sw;
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v[1].u = 1.0f;
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v[1].v = 0.0f;
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v[1].b = 191;
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v[2].sx = (w/2.0f)*ca + (h2/2.0f)*sa + mx;
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v[2].sy = (w/2.0f)*sa - (h2/2.0f)*ca + my;
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v[2].z = pt2.z;
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v[2].sw = pt2.sw;
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v[2].u = 1.0f;
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v[2].v = 1.0f;
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v[2].b = 191;
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v[3].sx = (-w/2.0f)*ca + (h1/2.0f)*sa + mx;
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v[3].sy = (-w/2.0f)*sa - (h1/2.0f)*ca + my;
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v[3].z = pt1.z;
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v[3].sw = pt1.sw;
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v[3].u = 0.0f;
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v[3].v = 1.0f;
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v[3].b = 191;
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gr_tmapper(4, vertlist, tmap_flags | TMAP_FLAG_CORRECT);
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return depth;
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}
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// Draw a laser shaped 3d looking thing using vertex coloring (useful for things like colored laser glows)
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// If max_len is > 1.0, then this caps the length to be no longer than max_len pixels
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float g3_draw_laser_rgb(vec3d *headp, float head_width, vec3d *tailp, float tail_width, int r, int g, int b, uint tmap_flags, float max_len )
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{
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if (!Lasers){
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return 0.0f;
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}
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if((!Cmdline_nohtl) && tmap_flags & TMAP_HTL_3D_UNLIT
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){
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// &&(gr_screen.mode==GR_OPENGL)) {
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return
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g3_draw_laser_htl(headp,head_width,tailp,tail_width,r,g,b,tmap_flags | TMAP_HTL_3D_UNLIT);
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}
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float headx, heady, headr, tailx, taily, tailr;
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vertex pt1, pt2;
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float depth;
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int head_on = 0;
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Assert( G3_count == 1 );
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g3_rotate_vertex(&pt1,headp);
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g3_project_vertex(&pt1);
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if (pt1.flags & PF_OVERFLOW)
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return 0.0f;
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g3_rotate_vertex(&pt2,tailp);
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g3_project_vertex(&pt2);
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if (pt2.flags & PF_OVERFLOW)
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return 0.0f;
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if ( (pt1.codes & pt2.codes) != 0 ) {
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// Both off the same side
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return 0.0f;
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}
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headx = pt1.sx;
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heady = pt1.sy;
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headr = (head_width*Matrix_scale.xyz.x*Canv_w2*pt1.sw);
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tailx = pt2.sx;
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taily = pt2.sy;
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tailr = (tail_width*Matrix_scale.xyz.x*Canv_w2*pt2.sw);
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float len_2d = fl_sqrt( (tailx-headx)*(tailx-headx) + (taily-heady)*(taily-heady) );
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// Cap the length if needed.
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if ( (max_len > 1.0f) && (len_2d > max_len) ) {
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float ratio = max_len / len_2d;
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tailx = headx + ( tailx - headx ) * ratio;
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taily = heady + ( taily - heady ) * ratio;
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tailr = headr + ( tailr - headr ) * ratio;
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len_2d = fl_sqrt( (tailx-headx)*(tailx-headx) + (taily-heady)*(taily-heady) );
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}
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depth = (pt1.z+pt2.z)*0.5f;
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float max_r = headr;
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float a;
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if ( tailr > max_r )
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max_r = tailr;
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if ( max_r < 1.0f )
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max_r = 1.0f;
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float mx, my, w, h1,h2;
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if ( len_2d < max_r ) {
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h1 = headr + (max_r-len_2d);
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if ( h1 > max_r ) h1 = max_r;
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h2 = tailr + (max_r-len_2d);
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if ( h2 > max_r ) h2 = max_r;
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len_2d = max_r;
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if ( fl_abs(tailx - headx) > 0.01f ) {
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a = (float)atan2( taily-heady, tailx-headx );
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} else {
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a = 0.0f;
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}
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w = len_2d;
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head_on = 1;
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} else {
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a = atan2_safe( taily-heady, tailx-headx );
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w = len_2d;
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h1 = headr;
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h2 = tailr;
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head_on = 0;
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}
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mx = (tailx+headx)/2.0f;
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my = (taily+heady)/2.0f;
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// gr_set_color(255,0,0);
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// g3_draw_line( &pt1, &pt2 );
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// gr_set_color( 255, 0, 0 );
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// gr_pixel( fl2i(mx),fl2i(my) );
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// Draw box with width 'w' and height 'h' at angle 'a' from horizontal
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// centered around mx, my
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if ( h1 < 1.0f ) h1 = 1.0f;
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if ( h2 < 1.0f ) h2 = 1.0f;
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float sa, ca;
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sa = (float)sin(a);
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ca = (float)cos(a);
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vertex v[4];
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vertex *vertlist[4] = { &v[3], &v[2], &v[1], &v[0] };
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memset(v,0,sizeof(vertex)*4);
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float sw;
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if ( depth < 0.0f ) depth = 0.0f;
|
|
sw = 1.0f / depth;
|
|
|
|
v[0].sx = (-w/2.0f)*ca + (-h1/2.0f)*sa + mx;
|
|
v[0].sy = (-w/2.0f)*sa - (-h1/2.0f)*ca + my;
|
|
v[0].z = pt1.z;
|
|
v[0].sw = pt1.sw;
|
|
v[0].u = 0.0f;
|
|
v[0].v = 0.0f;
|
|
v[0].r = (ubyte)r;
|
|
v[0].g = (ubyte)g;
|
|
v[0].b = (ubyte)b;
|
|
v[0].a = 255;
|
|
|
|
v[1].sx = (w/2.0f)*ca + (-h2/2.0f)*sa + mx;
|
|
v[1].sy = (w/2.0f)*sa - (-h2/2.0f)*ca + my;
|
|
v[1].z = pt2.z;
|
|
v[1].sw = pt2.sw;
|
|
v[1].u = 1.0f;
|
|
v[1].v = 0.0f;
|
|
v[1].r = (ubyte)r;
|
|
v[1].g = (ubyte)g;
|
|
v[1].b = (ubyte)b;
|
|
v[1].a = 255;
|
|
|
|
v[2].sx = (w/2.0f)*ca + (h2/2.0f)*sa + mx;
|
|
v[2].sy = (w/2.0f)*sa - (h2/2.0f)*ca + my;
|
|
v[2].z = pt2.z;
|
|
v[2].sw = pt2.sw;
|
|
v[2].u = 1.0f;
|
|
v[2].v = 1.0f;
|
|
v[2].r = (ubyte)r;
|
|
v[2].g = (ubyte)g;
|
|
v[2].b = (ubyte)b;
|
|
v[2].a = 255;
|
|
|
|
v[3].sx = (-w/2.0f)*ca + (h1/2.0f)*sa + mx;
|
|
v[3].sy = (-w/2.0f)*sa - (h1/2.0f)*ca + my;
|
|
v[3].z = pt1.z;
|
|
v[3].sw = pt1.sw;
|
|
v[3].u = 0.0f;
|
|
v[3].v = 1.0f;
|
|
v[3].r = (ubyte)r;
|
|
v[3].g = (ubyte)g;
|
|
v[3].b = (ubyte)b;
|
|
v[3].a = 255;
|
|
|
|
gr_tmapper(4, vertlist, tmap_flags | TMAP_FLAG_RGB | TMAP_FLAG_GOURAUD | TMAP_FLAG_CORRECT);
|
|
|
|
return depth;
|
|
}
|