458 lines
9 KiB
C
458 lines
9 KiB
C
/*
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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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*
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* Texture map assignment.
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*
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <stdarg.h>
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#include <math.h>
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#include <string.h>
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#include "inferno.h"
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#include "segment.h"
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#include "seguvs.h"
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#include "editor.h"
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#include "fix.h"
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#include "dxxerror.h"
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#include "kdefs.h"
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void compute_uv_side_center(uvl *uvcenter, segment *segp, int sidenum);
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void rotate_uv_points_on_side(segment *segp, int sidenum, fix *rotmat, uvl *uvcenter);
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// -----------------------------------------------------------
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int TexFlipX()
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{
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uvl uvcenter;
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fix rotmat[4];
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compute_uv_side_center(&uvcenter, Cursegp, Curside);
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// Create a rotation matrix
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rotmat[0] = -0xffff;
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rotmat[1] = 0;
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rotmat[2] = 0;
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rotmat[3] = 0xffff;
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rotate_uv_points_on_side(Cursegp, Curside, rotmat, &uvcenter);
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Update_flags |= UF_WORLD_CHANGED;
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return 1;
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}
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// -----------------------------------------------------------
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int TexFlipY()
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{
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uvl uvcenter;
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fix rotmat[4];
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compute_uv_side_center(&uvcenter, Cursegp, Curside);
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// Create a rotation matrix
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rotmat[0] = 0xffff;
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rotmat[1] = 0;
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rotmat[2] = 0;
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rotmat[3] = -0xffff;
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rotate_uv_points_on_side(Cursegp, Curside, rotmat, &uvcenter);
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Update_flags |= UF_WORLD_CHANGED;
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return 1;
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}
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// -----------------------------------------------------------
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int DoTexSlideLeft(int value)
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{
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side *sidep;
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uvl duvl03;
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fix dist;
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sbyte *vp;
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int v;
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vp = Side_to_verts[Curside];
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sidep = &Cursegp->sides[Curside];
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dist = vm_vec_dist(&Vertices[Cursegp->verts[vp[3]]], &Vertices[Cursegp->verts[vp[0]]]);
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dist *= value;
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if (dist < F1_0/(64*value))
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dist = F1_0/(64*value);
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duvl03.u = fixdiv(sidep->uvls[3].u - sidep->uvls[0].u,dist);
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duvl03.v = fixdiv(sidep->uvls[3].v - sidep->uvls[0].v,dist);
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for (v=0; v<4; v++) {
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sidep->uvls[v].u -= duvl03.u;
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sidep->uvls[v].v -= duvl03.v;
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}
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Update_flags |= UF_WORLD_CHANGED;
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return 1;
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}
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int TexSlideLeft()
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{
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return DoTexSlideLeft(3);
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}
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int TexSlideLeftBig()
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{
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return DoTexSlideLeft(1);
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}
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// -----------------------------------------------------------
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int DoTexSlideUp(int value)
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{
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side *sidep;
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uvl duvl03;
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fix dist;
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sbyte *vp;
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int v;
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vp = Side_to_verts[Curside];
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sidep = &Cursegp->sides[Curside];
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dist = vm_vec_dist(&Vertices[Cursegp->verts[vp[1]]], &Vertices[Cursegp->verts[vp[0]]]);
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dist *= value;
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if (dist < F1_0/(64*value))
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dist = F1_0/(64*value);
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duvl03.u = fixdiv(sidep->uvls[1].u - sidep->uvls[0].u,dist);
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duvl03.v = fixdiv(sidep->uvls[1].v - sidep->uvls[0].v,dist);
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for (v=0; v<4; v++) {
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sidep->uvls[v].u -= duvl03.u;
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sidep->uvls[v].v -= duvl03.v;
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}
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Update_flags |= UF_WORLD_CHANGED;
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return 1;
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}
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int TexSlideUp()
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{
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return DoTexSlideUp(3);
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}
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int TexSlideUpBig()
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{
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return DoTexSlideUp(1);
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}
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// -----------------------------------------------------------
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int DoTexSlideDown(int value)
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{
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side *sidep;
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uvl duvl03;
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fix dist;
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sbyte *vp;
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int v;
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vp = Side_to_verts[Curside];
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sidep = &Cursegp->sides[Curside];
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dist = vm_vec_dist(&Vertices[Cursegp->verts[vp[1]]], &Vertices[Cursegp->verts[vp[0]]]);
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dist *= value;
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if (dist < F1_0/(64*value))
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dist = F1_0/(64*value);
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duvl03.u = fixdiv(sidep->uvls[1].u - sidep->uvls[0].u,dist);
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duvl03.v = fixdiv(sidep->uvls[1].v - sidep->uvls[0].v,dist);
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for (v=0; v<4; v++) {
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sidep->uvls[v].u += duvl03.u;
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sidep->uvls[v].v += duvl03.v;
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}
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Update_flags |= UF_WORLD_CHANGED;
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return 1;
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}
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int TexSlideDown()
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{
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return DoTexSlideDown(3);
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}
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int TexSlideDownBig()
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{
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return DoTexSlideDown(1);
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}
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// -----------------------------------------------------------
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// Compute the center of the side in u,v coordinates.
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void compute_uv_side_center(uvl *uvcenter, segment *segp, int sidenum)
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{
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int v;
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side *sidep = &segp->sides[sidenum];
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uvcenter->u = 0;
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uvcenter->v = 0;
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for (v=0; v<4; v++) {
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uvcenter->u += sidep->uvls[v].u;
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uvcenter->v += sidep->uvls[v].v;
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}
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uvcenter->u /= 4;
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uvcenter->v /= 4;
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}
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// -----------------------------------------------------------
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// rotate point *uv by matrix rotmat, return *uvrot
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void rotate_uv_point(uvl *uvrot, fix *rotmat, uvl *uv, uvl *uvcenter)
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{
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uvrot->u = fixmul(uv->u - uvcenter->u,rotmat[0]) + fixmul(uv->v - uvcenter->v,rotmat[1]) + uvcenter->u;
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uvrot->v = fixmul(uv->u - uvcenter->u,rotmat[2]) + fixmul(uv->v - uvcenter->v,rotmat[3]) + uvcenter->v;
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}
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// -----------------------------------------------------------
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// Compute the center of the side in u,v coordinates.
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void rotate_uv_points_on_side(segment *segp, int sidenum, fix *rotmat, uvl *uvcenter)
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{
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int v;
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side *sidep = &segp->sides[sidenum];
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uvl tuv;
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for (v=0; v<4; v++) {
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rotate_uv_point(&tuv, rotmat, &sidep->uvls[v], uvcenter);
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sidep->uvls[v] = tuv;
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}
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}
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// -----------------------------------------------------------
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// ang is in 0..ffff = 0..359.999 degrees
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// rotmat is filled in with 4 fixes
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void create_2d_rotation_matrix(fix *rotmat, fix ang)
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{
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fix sinang, cosang;
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fix_sincos(ang, &sinang, &cosang);
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rotmat[0] = cosang;
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rotmat[1] = sinang;
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rotmat[2] = -sinang;
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rotmat[3] = cosang;
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}
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// -----------------------------------------------------------
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int DoTexRotateLeft(int value)
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{
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uvl uvcenter;
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fix rotmat[4];
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compute_uv_side_center(&uvcenter, Cursegp, Curside);
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// Create a rotation matrix
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create_2d_rotation_matrix(rotmat, -F1_0/value);
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rotate_uv_points_on_side(Cursegp, Curside, rotmat, &uvcenter);
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Update_flags |= UF_WORLD_CHANGED;
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return 1;
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}
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int TexRotateLeft()
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{
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return DoTexRotateLeft(192);
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}
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int TexRotateLeftBig()
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{
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return DoTexRotateLeft(64);
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}
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// -----------------------------------------------------------
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int DoTexSlideRight(int value)
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{
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side *sidep;
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uvl duvl03;
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fix dist;
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sbyte *vp;
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int v;
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vp = Side_to_verts[Curside];
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sidep = &Cursegp->sides[Curside];
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dist = vm_vec_dist(&Vertices[Cursegp->verts[vp[3]]], &Vertices[Cursegp->verts[vp[0]]]);
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dist *= value;
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if (dist < F1_0/(64*value))
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dist = F1_0/(64*value);
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duvl03.u = fixdiv(sidep->uvls[3].u - sidep->uvls[0].u,dist);
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duvl03.v = fixdiv(sidep->uvls[3].v - sidep->uvls[0].v,dist);
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for (v=0; v<4; v++) {
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sidep->uvls[v].u += duvl03.u;
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sidep->uvls[v].v += duvl03.v;
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}
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Update_flags |= UF_WORLD_CHANGED;
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return 1;
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}
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int TexSlideRight()
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{
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return DoTexSlideRight(3);
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}
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int TexSlideRightBig()
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{
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return DoTexSlideRight(1);
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}
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// -----------------------------------------------------------
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int DoTexRotateRight(int value)
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{
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uvl uvcenter;
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fix rotmat[4];
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compute_uv_side_center(&uvcenter, Cursegp, Curside);
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// Create a rotation matrix
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create_2d_rotation_matrix(rotmat, F1_0/value);
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rotate_uv_points_on_side(Cursegp, Curside, rotmat, &uvcenter);
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Update_flags |= UF_WORLD_CHANGED;
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return 1;
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}
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int TexRotateRight()
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{
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return DoTexRotateRight(192);
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}
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int TexRotateRightBig()
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{
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return DoTexRotateRight(64);
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}
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// -----------------------------------------------------------
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int TexSelectActiveEdge()
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{
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return 1;
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}
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// -----------------------------------------------------------
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int TexRotate90Degrees()
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{
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uvl uvcenter;
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fix rotmat[4];
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compute_uv_side_center(&uvcenter, Cursegp, Curside);
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// Create a rotation matrix
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create_2d_rotation_matrix(rotmat, F1_0/4);
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rotate_uv_points_on_side(Cursegp, Curside, rotmat, &uvcenter);
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Update_flags |= UF_WORLD_CHANGED;
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return 1;
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}
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// -----------------------------------------------------------
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int TexSetDefault()
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{
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Num_tilings = 1;
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Stretch_scale_x = F1_0;
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Stretch_scale_y = F1_0;
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assign_default_uvs_to_side(Cursegp,Curside);
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Update_flags |= UF_GAME_VIEW_CHANGED;
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return 1;
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}
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// -----------------------------------------------------------
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int TexIncreaseTiling()
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{
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Num_tilings++;
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assign_default_uvs_to_side(Cursegp, Curside);
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Update_flags |= UF_GAME_VIEW_CHANGED;
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return 1;
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}
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// -----------------------------------------------------------
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int TexDecreaseTiling()
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{
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if (--Num_tilings < 1)
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Num_tilings = 1;
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assign_default_uvs_to_side(Cursegp, Curside);
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Update_flags |= UF_GAME_VIEW_CHANGED;
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return 1;
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}
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// direction = -1 or 1 depending on direction
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int TexStretchCommon(int direction)
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{
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fix *sptr;
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if ((Curedge == 0) || (Curedge == 2))
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sptr = &Stretch_scale_x;
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else
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sptr = &Stretch_scale_y;
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*sptr += direction*F1_0/64;
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if (*sptr < F1_0/16)
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*sptr = F1_0/16;
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if (*sptr > 2*F1_0)
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*sptr = 2*F1_0;
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stretch_uvs_from_curedge(Cursegp, Curside);
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editor_status("Stretch scale = %7.4f, use Set Default to return to 1.0", f2fl(*sptr));
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Update_flags |= UF_GAME_VIEW_CHANGED;
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return 1;
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}
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int TexStretchDown(void)
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{
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return TexStretchCommon(-1);
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}
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int TexStretchUp(void)
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{
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return TexStretchCommon(1);
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}
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