2 THE COMPUTER CODE CONTAINED HEREIN IS THE SOLE PROPERTY OF PARALLAX
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8 FREE PURPOSES. IN NO EVENT SHALL THE END-USER USE THE COMPUTER CODE
9 CONTAINED HEREIN FOR REVENUE-BEARING PURPOSES. THE END-USER UNDERSTANDS
10 AND AGREES TO THE TERMS HEREIN AND ACCEPTS THE SAME BY USE OF THIS FILE.
11 COPYRIGHT 1993-1998 PARALLAX SOFTWARE CORPORATION. ALL RIGHTS RESERVED.
16 * Functions for sizing segments
36 #define MAX_MODIFIED_VERTICES 32
37 int Modified_vertices[MAX_MODIFIED_VERTICES];
38 int Modified_vertex_index = 0;
40 // ------------------------------------------------------------------------------------------
41 void validate_modified_segments(void)
44 char modified_segments[MAX_SEGMENTS];
46 for (v=0; v<=Highest_segment_index; v++)
47 modified_segments[v] = 0;
49 for (v=0; v<Modified_vertex_index; v++) {
50 v0 = Modified_vertices[v];
52 for (seg = 0; seg <= Highest_segment_index; seg++) {
53 short *vp = Segments[seg].verts;
54 if (Segments[seg].segnum != -1)
55 for (w=0; w<MAX_VERTICES_PER_SEGMENT; w++)
57 modified_segments[seg] = 1;
61 for (v=0; v<=Highest_segment_index; v++)
62 if (modified_segments[v]) {
65 // mprintf(0, "Validating segment #%04i\n", v);
66 validate_segment(&Segments[v]);
67 for (s=0; s<MAX_SIDES_PER_SEGMENT; s++) {
69 assign_default_uvs_to_side(&Segments[v], s);
74 // ------------------------------------------------------------------------------------------
75 // Scale vertex *vertp by vector *vp, scaled by scale factor scale_factor
76 void scale_vert_aux(int vertex_ind, vms_vector *vp, fix scale_factor)
78 vms_vector *vertp = &Vertices[vertex_ind];
80 vertp->x += fixmul(vp->x,scale_factor)/2;
81 vertp->y += fixmul(vp->y,scale_factor)/2;
82 vertp->z += fixmul(vp->z,scale_factor)/2;
84 Assert(Modified_vertex_index < MAX_MODIFIED_VERTICES);
85 Modified_vertices[Modified_vertex_index++] = vertex_ind;
88 // ------------------------------------------------------------------------------------------
89 void scale_vert(segment *sp, int vertex_ind, vms_vector *vp, fix scale_factor)
91 switch (SegSizeMode) {
92 case SEGSIZEMODE_FREE:
93 if (is_free_vertex(vertex_ind))
94 scale_vert_aux(vertex_ind, vp, scale_factor);
97 scale_vert_aux(vertex_ind, vp, scale_factor);
99 case SEGSIZEMODE_CURSIDE: {
102 if (sp->verts[Side_to_verts[Curside][v]] == vertex_ind)
103 scale_vert_aux(vertex_ind, vp, scale_factor);
106 case SEGSIZEMODE_EDGE: {
110 if (sp->verts[Side_to_verts[Curside][(Curedge+v)%4]] == vertex_ind)
111 scale_vert_aux(vertex_ind, vp, scale_factor);
114 case SEGSIZEMODE_VERTEX:
115 if (sp->verts[Side_to_verts[Curside][Curvert]] == vertex_ind)
116 scale_vert_aux(vertex_ind, vp, scale_factor);
119 Error("Unsupported SegSizeMode in ksegsize.c/scale_vert = %i\n", SegSizeMode);
124 // ------------------------------------------------------------------------------------------
125 void scale_free_verts(segment *sp, vms_vector *vp, int side, fix scale_factor)
131 verts = Side_to_verts[side];
133 for (v=0; v<4; v++) {
134 vertex_ind = sp->verts[(int) verts[v]];
135 if (SegSizeMode || is_free_vertex(vertex_ind))
136 scale_vert(sp, vertex_ind, vp, scale_factor);
142 // -----------------------------------------------------------------------------
143 // Make segment *sp bigger in dimension dimension by amount amount.
144 void med_scale_segment_new(segment *sp, int dimension, fix amount)
148 Modified_vertex_index = 0;
150 med_extract_matrix_from_segment(sp, &mat);
154 scale_free_verts(sp, &mat.rvec, WLEFT, -amount);
155 scale_free_verts(sp, &mat.rvec, WRIGHT, +amount);
158 scale_free_verts(sp, &mat.uvec, WBOTTOM, -amount);
159 scale_free_verts(sp, &mat.uvec, WTOP, +amount);
162 scale_free_verts(sp, &mat.fvec, WFRONT, -amount);
163 scale_free_verts(sp, &mat.fvec, WBACK, +amount);
167 validate_modified_segments();
170 // ------------------------------------------------------------------------------------------
171 // Extract a vector from a segment. The vector goes from the start face to the end face.
172 // The point on each face is the average of the four points forming the face.
173 void extract_vector_from_segment_side(segment *sp, int side, vms_vector *vp, int vla, int vlb, int vra, int vrb)
177 vm_vec_sub(&v1,&Vertices[sp->verts[Side_to_verts[side][vra]]],&Vertices[sp->verts[Side_to_verts[side][vla]]]);
178 vm_vec_sub(&v2,&Vertices[sp->verts[Side_to_verts[side][vrb]]],&Vertices[sp->verts[Side_to_verts[side][vlb]]]);
179 vm_vec_add(vp, &v1, &v2);
181 vm_vec_scale(vp, F1_0/2);
184 // ------------------------------------------------------------------------------------------
185 // Extract the right vector from segment *sp, return in *vp.
186 // The forward vector is defined to be the vector from the the center of the left face of the segment
187 // to the center of the right face of the segment.
188 void med_extract_right_vector_from_segment_side(segment *sp, int sidenum, vms_vector *vp)
190 extract_vector_from_segment_side(sp, sidenum, vp, 3, 2, 0, 1);
193 // ------------------------------------------------------------------------------------------
194 // Extract the up vector from segment *sp, return in *vp.
195 // The forward vector is defined to be the vector from the the center of the bottom face of the segment
196 // to the center of the top face of the segment.
197 void med_extract_up_vector_from_segment_side(segment *sp, int sidenum, vms_vector *vp)
199 extract_vector_from_segment_side(sp, sidenum, vp, 1, 2, 0, 3);
203 // -----------------------------------------------------------------------------
204 // Increase the size of Cursegp in dimension dimension by amount
205 int segsize_common(int dimension, fix amount)
208 int propagated[MAX_SIDES_PER_SEGMENT];
209 vms_vector uvec, rvec, fvec, scalevec;
211 Degenerate_segment_found = 0;
213 med_scale_segment_new(Cursegp, dimension, amount);
215 med_extract_up_vector_from_segment_side(Cursegp, Curside, &uvec);
216 med_extract_right_vector_from_segment_side(Cursegp, Curside, &rvec);
217 extract_forward_vector_from_segment(Cursegp, &fvec);
219 scalevec.x = vm_vec_mag(&rvec);
220 scalevec.y = vm_vec_mag(&uvec);
221 scalevec.z = vm_vec_mag(&fvec);
223 if (Degenerate_segment_found) {
224 Degenerate_segment_found = 0;
225 // mprintf(0, "Applying scale would create degenerate segments. Aborting scale.\n");
226 editor_status("Applying scale would create degenerate segments. Aborting scale.");
227 med_scale_segment_new(Cursegp, dimension, -amount);
231 med_create_new_segment(&scalevec);
233 // For all segments to which Cursegp is connected, propagate tmap (uv coordinates) from the connected
234 // segment back to Cursegp. This will meaningfully propagate uv coordinates to all sides which havve
235 // an incident edge. It will also do some sides more than once. And it is probably just not what you want.
236 for (i=0; i<MAX_SIDES_PER_SEGMENT; i++)
239 for (i=0; i<MAX_SIDES_PER_SEGMENT; i++)
240 if (IS_CHILD(Cursegp->children[i])) {
242 for (s=0; s<MAX_SIDES_PER_SEGMENT; s++)
244 propagated[(int) Side_opposite[i]]--;
245 med_propagate_tmaps_to_segments(&Segments[Cursegp->children[i]],Cursegp,1);
248 // Now, for all sides that were not adjacent to another side, and therefore did not get tmaps
249 // propagated to them, treat as a back side.
250 for (i=0; i<MAX_SIDES_PER_SEGMENT; i++)
251 if (!propagated[i]) {
252 med_propagate_tmaps_to_back_side(Cursegp, i, 1);
255 // New stuff, assign default texture to all affected sides.
257 Update_flags |= UF_WORLD_CHANGED;
262 // -----------------------------------------------------------------------------
263 // ---------- segment size control ----------
265 int IncreaseSegLength()
267 return segsize_common(ZDIM,+F1_0);
270 int DecreaseSegLength()
272 return segsize_common(ZDIM,-F1_0);
275 int DecreaseSegWidth()
277 return segsize_common(XDIM,-F1_0);
280 int IncreaseSegWidth()
282 return segsize_common(XDIM,+F1_0);
285 int IncreaseSegHeight()
287 return segsize_common(YDIM,+F1_0);
290 int DecreaseSegHeight()
292 return segsize_common(YDIM,-F1_0);
296 int IncreaseSegLengthBig()
298 return segsize_common(ZDIM,+5 * F1_0);
301 int DecreaseSegLengthBig()
303 return segsize_common(ZDIM,-5 * F1_0);
306 int DecreaseSegWidthBig()
308 return segsize_common(XDIM,-5 * F1_0);
311 int IncreaseSegWidthBig()
313 return segsize_common(XDIM,+5 * F1_0);
316 int IncreaseSegHeightBig()
318 return segsize_common(YDIM,+5 * F1_0);
321 int DecreaseSegHeightBig()
323 return segsize_common(YDIM,-5 * F1_0);
327 int IncreaseSegLengthDefault()
329 return segsize_common(ZDIM,+40 *F1_0);
332 int DecreaseSegLengthDefault()
334 return segsize_common(ZDIM,-40*F1_0);
337 int IncreaseSegWidthDefault()
339 return segsize_common(XDIM,+40*F1_0);
342 int DecreaseSegWidthDefault()
344 return segsize_common(XDIM,-40*F1_0);
347 int IncreaseSegHeightDefault()
349 return segsize_common(YDIM,+40 * F1_0);
352 int DecreaseSegHeightDefault()
354 return segsize_common(YDIM,-40 * F1_0);
359 // ---------------------------------------------------------------------------
360 int ToggleSegSizeMode(void)
363 if (SegSizeMode > SEGSIZEMODE_MAX)
364 SegSizeMode = SEGSIZEMODE_MIN;
369 // ---------------------------------------------------------------------------
370 int PerturbCursideCommon(fix amount)
372 int saveSegSizeMode = SegSizeMode;
373 vms_vector fvec, rvec, uvec;
374 fix fmag, rmag, umag;
377 SegSizeMode = SEGSIZEMODE_CURSIDE;
379 Modified_vertex_index = 0;
381 extract_forward_vector_from_segment(Cursegp, &fvec);
382 extract_right_vector_from_segment(Cursegp, &rvec);
383 extract_up_vector_from_segment(Cursegp, &uvec);
385 fmag = vm_vec_mag(&fvec);
386 rmag = vm_vec_mag(&rvec);
387 umag = vm_vec_mag(&uvec);
389 for (v=0; v<4; v++) {
390 vms_vector perturb_vec;
392 perturb_vec.x = fixmul(rmag, d_rand()*2 - 32767);
393 perturb_vec.y = fixmul(umag, d_rand()*2 - 32767);
394 perturb_vec.z = fixmul(fmag, d_rand()*2 - 32767);
396 scale_vert(Cursegp, Cursegp->verts[Side_to_verts[Curside][v]], &perturb_vec, amount);
399 // validate_segment(Cursegp);
400 // if (SegSizeMode) {
401 // for (i=0; i<MAX_SIDES_PER_SEGMENT; i++)
402 // if (Cursegp->children[i] != -1)
403 // validate_segment(&Segments[Cursegp->children[i]]);
406 validate_modified_segments();
407 SegSizeMode = saveSegSizeMode;
409 Update_flags |= UF_WORLD_CHANGED;
415 // ---------------------------------------------------------------------------
416 int PerturbCurside(void)
418 PerturbCursideCommon(F1_0/10);
423 // ---------------------------------------------------------------------------
424 int PerturbCursideBig(void)
426 PerturbCursideCommon(F1_0/2);