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ropeNode.I
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1/**
2 * PANDA 3D SOFTWARE
3 * Copyright (c) Carnegie Mellon University. All rights reserved.
4 *
5 * All use of this software is subject to the terms of the revised BSD
6 * license. You should have received a copy of this license along
7 * with this source code in a file named "LICENSE."
8 *
9 * @file ropeNode.I
10 * @author drose
11 * @date 2002-12-04
12 */
13
14/**
15 *
16 */
17INLINE RopeNode::CData::
18CData() {
19 _curve = new NurbsCurveEvaluator;
20 _render_mode = RopeNode::RM_thread;
21 _uv_mode = RopeNode::UV_none;
22 _u_dominant = true;
23 _uv_scale = 1.0f;
24 _normal_mode = RopeNode::NM_none;
25 _tube_up = LVector3::up();
26 _matrix = LMatrix4::ident_mat();
27 _has_matrix = false;
28 _use_vertex_color = false;
29 _num_subdiv = 10;
30 _num_slices = 5;
31 _use_vertex_thickness = false;
32 _thickness = 1.0f;
33}
34
35/**
36 *
37 */
38INLINE RopeNode::CData::
39CData(const RopeNode::CData &copy) :
40 _curve(copy._curve),
41 _render_mode(copy._render_mode),
42 _uv_mode(copy._uv_mode),
43 _u_dominant(copy._u_dominant),
44 _uv_scale(copy._uv_scale),
45 _normal_mode(copy._normal_mode),
46 _tube_up(copy._tube_up),
47 _matrix(copy._matrix),
48 _has_matrix(copy._has_matrix),
49 _use_vertex_color(copy._use_vertex_color),
50 _num_subdiv(copy._num_subdiv),
51 _num_slices(copy._num_slices),
52 _use_vertex_thickness(copy._use_vertex_thickness),
53 _thickness(copy._thickness)
54{
55}
56
57/**
58 * Sets the particular curve represented by the RopeNode.
59 */
60INLINE void RopeNode::
61 set_curve(NurbsCurveEvaluator *curve) {
62 CDWriter cdata(_cycler);
63 cdata->_curve = curve;
64}
65
66/**
67 * Returns the curve represented by the RopeNode.
68 */
69INLINE NurbsCurveEvaluator *RopeNode::
70 get_curve() const {
71 CDReader cdata(_cycler);
72 return cdata->_curve;
73}
74
75/**
76 * Specifies the method used to render the rope. The simplest is RM_thread,
77 * which just draws a one-pixel line segment.
78 */
79INLINE void RopeNode::
80 set_render_mode(RopeNode::RenderMode render_mode) {
81 CDWriter cdata(_cycler);
82 cdata->_render_mode = render_mode;
83}
84
85/**
86 * Returns the method used to render the rope. See set_render_mode().
87 */
88INLINE RopeNode::RenderMode RopeNode::
89 get_render_mode() const {
90 CDReader cdata(_cycler);
91 return cdata->_render_mode;
92}
93
94/**
95 * Specifies the algorithm to use to generate UV's for the rope.
96 */
97INLINE void RopeNode::
98 set_uv_mode(RopeNode::UVMode uv_mode) {
99 CDWriter cdata(_cycler);
100 cdata->_uv_mode = uv_mode;
101}
102
103/**
104 * Returns the algorithm to use to generate UV's for the rope.
105 */
106INLINE RopeNode::UVMode RopeNode::
107 get_uv_mode() const {
108 CDReader cdata(_cycler);
109 return cdata->_uv_mode;
110}
111
112/**
113 * Specify true to vary the U coordinate down the length of the rope, or false
114 * to vary the V coordinate.
115 */
116INLINE void RopeNode::
117 set_uv_direction(bool u_dominant) {
118 CDWriter cdata(_cycler);
119 cdata->_u_dominant = u_dominant;
120}
121
122/**
123 * Returns true if the rope runs down the U coordinate of the texture, or
124 * false if it runs down the V coordinate.
125 */
126INLINE bool RopeNode::
127 get_uv_direction() const {
128 CDReader cdata(_cycler);
129 return cdata->_u_dominant;
130}
131
132/**
133 * Specifies an additional scaling factor to apply to generated UV's along the
134 * rope. This scale factor is applied in whichever direction is along the
135 * rope, as specified by set_uv_direction().
136 */
137INLINE void RopeNode::
138 set_uv_scale(PN_stdfloat uv_scale) {
139 CDWriter cdata(_cycler);
140 cdata->_uv_scale = uv_scale;
141}
142
143/**
144 * Returns the scaling factor to apply to generated UV's for the rope.
145 */
146INLINE PN_stdfloat RopeNode::
147 get_uv_scale() const {
148 CDReader cdata(_cycler);
149 return cdata->_uv_scale;
150}
151
152/**
153 * Specifies the kind of normals to generate for the rope. This is only
154 * applicable when the RenderMode is set to RM_tube; in the other render
155 * modes, normals are never generated.
156 */
157INLINE void RopeNode::
158 set_normal_mode(RopeNode::NormalMode normal_mode) {
159 CDWriter cdata(_cycler);
160 cdata->_normal_mode = normal_mode;
161}
162
163/**
164 * Returns the kind of normals to generate for the rope. This is only
165 * applicable when the RenderMode is set to RM_tube.
166 */
167INLINE RopeNode::NormalMode RopeNode::
168 get_normal_mode() const {
169 CDReader cdata(_cycler);
170 return cdata->_normal_mode;
171}
172
173/**
174 * Specifies a normal vector, generally perpendicular to the main axis of the
175 * starting point of the curve, that controls the "top" of the curve, when
176 * RenderMode is RM_tube. This is used to orient the vertices that make up
177 * the tube. If this vector is too nearly parallel with the starting
178 * direction of the curve, there may be a tendency for the whole tube to
179 * gimble-lock around its primary axis.
180 */
181INLINE void RopeNode::
182 set_tube_up(const LVector3 &tube_up) {
183 CDWriter cdata(_cycler);
184 cdata->_tube_up = tube_up;
185}
186
187/**
188 * Returns the normal vector used to control the "top" of the curve, when
189 * RenderMode is RM_tube. See set_tube_up().
190 */
191INLINE const LVector3 &RopeNode::
192 get_tube_up() const {
193 CDReader cdata(_cycler);
194 return cdata->_tube_up;
195}
196
197/**
198 * Sets the "use vertex color" flag. When this is true, the R, G, B, A vertex
199 * color is assumed to be stored as the dimensions n + 0, n + 1, n + 2, n + 3,
200 * respectively, of the extended vertex values, where n is the value returned
201 * by get_vertex_color_dimension(). Use
202 * NurbsCurveEvaluator::set_extended_vertex() to set these values.
203 */
204INLINE void RopeNode::
205 set_use_vertex_color(bool flag) {
206 CDWriter cdata(_cycler);
207 cdata->_use_vertex_color = flag;
208}
209
210/**
211 * Returns the "use vertex color" flag. See set_use_vertex_color().
212 */
213INLINE bool RopeNode::
214 get_use_vertex_color() const {
215 CDReader cdata(_cycler);
216 return cdata->_use_vertex_color;
217}
218
219/**
220 * Returns the numeric extended dimension in which the color components should
221 * be found. See NurbsCurveEvaluator::set_extended_vertex().
222 *
223 * The color components will be expected at (n, n + 1, n + 2, n + 3).
224 */
225INLINE int RopeNode::
226 get_vertex_color_dimension() {
227 return 0;
228}
229
230/**
231 * Specifies the number of subdivisions per cubic segment (that is, per unique
232 * knot value) to draw in a fixed uniform tesselation of the curve.
233 */
234INLINE void RopeNode::
235 set_num_subdiv(int num_subdiv) {
236 nassertv(num_subdiv >= 0);
237 CDWriter cdata(_cycler);
238 cdata->_num_subdiv = num_subdiv;
239}
240
241/**
242 * Returns the number of subdivisions per cubic segment to draw. See
243 * set_num_subdiv().
244 */
245INLINE int RopeNode::
246 get_num_subdiv() const {
247 CDReader cdata(_cycler);
248 return cdata->_num_subdiv;
249}
250
251/**
252 * Specifies the number of radial subdivisions to make if RenderMode is
253 * RM_tube. It is ignored in the other render modes.
254 *
255 * Increasing this number increases the roundness of a cross-section of the
256 * tube. The minimum value for a dimensional tube is 3; setting it to 2 will
257 * get you a thin piece of tape (which is similar to RM_billboard, except it
258 * won't rotate to face the camera).
259 */
260INLINE void RopeNode::
261 set_num_slices(int num_slices) {
262 nassertv(num_slices >= 0);
263 CDWriter cdata(_cycler);
264 cdata->_num_slices = num_slices;
265}
266
267/**
268 * Returns the number of radial subdivisions to make if RenderMode is RM_tube.
269 * It is ignored in the other render modes. See set_num_slices().
270 */
271INLINE int RopeNode::
272 get_num_slices() const {
273 CDReader cdata(_cycler);
274 return cdata->_num_slices;
275}
276
277/**
278 * Sets the "use vertex thickness" flag. When this is true, the vertex
279 * thickness is assumed to be stored as the dimension
280 * get_vertex_thickness_dimension(), of the extended vertex values. Use
281 * NurbsCurveEvaluator::set_extended_vertex() to set these values.
282 *
283 * In this mode, the overall thickness is also applied as a scale to the
284 * vertex thickness. Not all render modes support vertex thickness.
285 */
286INLINE void RopeNode::
287 set_use_vertex_thickness(bool flag) {
288 CDWriter cdata(_cycler);
289 cdata->_use_vertex_thickness = flag;
290}
291
292/**
293 * Returns the "use vertex thickness" flag. See set_use_vertex_thickness().
294 */
295INLINE bool RopeNode::
296 get_use_vertex_thickness() const {
297 CDReader cdata(_cycler);
298 return cdata->_use_vertex_thickness;
299}
300
301/**
302 * Returns the numeric extended dimension in which the thickness component
303 * should be found. See NurbsCurveEvaluator::set_extended_vertex().
304 */
305INLINE int RopeNode::
306 get_vertex_thickness_dimension() {
307 return 4;
308}
309
310/**
311 * Specifies the thickness of the rope, in pixels or in spatial units,
312 * depending on the render mode. See set_render_mode().
313 *
314 * The thickness may also be specified on a per-vertex basis. See
315 * set_use_vertex_thickness().
316 */
317INLINE void RopeNode::
318 set_thickness(PN_stdfloat thickness) {
319 nassertv(thickness >= 0);
320 CDWriter cdata(_cycler);
321 cdata->_thickness = thickness;
322}
323
324/**
325 * Returns the thickness of the rope. See set_thickness().
326 */
327INLINE PN_stdfloat RopeNode::
328 get_thickness() const {
329 CDReader cdata(_cycler);
330 return cdata->_thickness;
331}
332
333/**
334 * Specifies an optional matrix which is used to transform each control vertex
335 * after it has been transformed into the RopeNode's coordinate space, but
336 * before the polygon vertices are generated.
337 */
338INLINE void RopeNode::
339 set_matrix(const LMatrix4 &matrix) {
340 CDWriter cdata(_cycler);
341 cdata->_matrix = matrix;
342 cdata->_has_matrix = true;
343}
344
345/**
346 * Resets the node's matrix to identity. See set_matrix().
347 */
348INLINE void RopeNode::
349 clear_matrix() {
350 CDWriter cdata(_cycler);
351 cdata->_matrix = LMatrix4::ident_mat();
352 cdata->_has_matrix = false;
353}
354
355/**
356 * Returns true if the node has a matrix set, false otherwise. See
357 * set_matrix().
358 */
359INLINE bool RopeNode::
360 has_matrix() const {
361 CDReader cdata(_cycler);
362 return cdata->_has_matrix;
363}
364
365/**
366 * Returns the optional matrix which is used to transform each control vertex
367 * after it has been transformed into the RopeNode's coordinate space, but
368 * before the polygon vertices are generated.
369 */
370INLINE const LMatrix4 &RopeNode::
371 get_matrix() const {
372 CDReader cdata(_cycler);
373 return cdata->_matrix;
374}
NurbsCurveEvaluator
This class is an abstraction for evaluating NURBS curves.
Definition nurbsCurveEvaluator.h:39
RopeNode::set_num_slices
set_num_slices
Specifies the number of radial subdivisions to make if RenderMode is RM_tube.
Definition ropeNode.h:150
RopeNode::get_num_slices
get_num_slices
Returns the number of radial subdivisions to make if RenderMode is RM_tube.
Definition ropeNode.h:150
RopeNode::get_vertex_thickness_dimension
get_vertex_thickness_dimension
Returns the numeric extended dimension in which the thickness component should be found.
Definition ropeNode.h:152
RopeNode::get_render_mode
get_render_mode
Returns the method used to render the rope.
Definition ropeNode.h:141
RopeNode::clear_matrix
clear_matrix
Resets the node's matrix to identity.
Definition ropeNode.h:154
RopeNode::set_use_vertex_thickness
set_use_vertex_thickness
Sets the "use vertex thickness" flag.
Definition ropeNode.h:151
RopeNode::set_thickness
set_thickness
Specifies the thickness of the rope, in pixels or in spatial units, depending on the render mode.
Definition ropeNode.h:153
RopeNode::get_thickness
get_thickness
Returns the thickness of the rope.
Definition ropeNode.h:153
RopeNode::set_num_subdiv
set_num_subdiv
Specifies the number of subdivisions per cubic segment (that is, per unique knot value) to draw in a ...
Definition ropeNode.h:149
RopeNode::get_normal_mode
get_normal_mode
Returns the kind of normals to generate for the rope.
Definition ropeNode.h:145
RopeNode::has_matrix
has_matrix
Returns true if the node has a matrix set, false otherwise.
Definition ropeNode.h:154
RopeNode::get_uv_mode
get_uv_mode
Returns the algorithm to use to generate UV's for the rope.
Definition ropeNode.h:142
RopeNode::set_uv_direction
set_uv_direction
Specify true to vary the U coordinate down the length of the rope, or false to vary the V coordinate.
Definition ropeNode.h:143
RopeNode::set_normal_mode
set_normal_mode
Specifies the kind of normals to generate for the rope.
Definition ropeNode.h:145
RopeNode::get_num_subdiv
get_num_subdiv
Returns the number of subdivisions per cubic segment to draw.
Definition ropeNode.h:149
RopeNode::get_uv_scale
get_uv_scale
Returns the scaling factor to apply to generated UV's for the rope.
Definition ropeNode.h:144
RopeNode::set_uv_mode
set_uv_mode
Specifies the algorithm to use to generate UV's for the rope.
Definition ropeNode.h:142
RopeNode::get_use_vertex_color
get_use_vertex_color
Returns the "use vertex color" flag.
Definition ropeNode.h:147
RopeNode::get_uv_direction
get_uv_direction
Returns true if the rope runs down the U coordinate of the texture, or false if it runs down the V co...
Definition ropeNode.h:143
RopeNode::get_tube_up
get_tube_up
Returns the normal vector used to control the "top" of the curve, when RenderMode is RM_tube.
Definition ropeNode.h:146
RopeNode::set_render_mode
set_render_mode
Specifies the method used to render the rope.
Definition ropeNode.h:141
RopeNode::get_vertex_color_dimension
get_vertex_color_dimension
Returns the numeric extended dimension in which the color components should be found.
Definition ropeNode.h:148
RopeNode::get_use_vertex_thickness
get_use_vertex_thickness
Returns the "use vertex thickness" flag.
Definition ropeNode.h:151
RopeNode::get_matrix
get_matrix
Returns the optional matrix which is used to transform each control vertex after it has been transfor...
Definition ropeNode.h:154
RopeNode::set_matrix
set_matrix
Specifies an optional matrix which is used to transform each control vertex after it has been transfo...
Definition ropeNode.h:154
RopeNode::get_curve
get_curve
Returns the curve represented by the RopeNode.
Definition ropeNode.h:140
RopeNode::set_tube_up
set_tube_up
Specifies a normal vector, generally perpendicular to the main axis of the starting point of the curv...
Definition ropeNode.h:146
RopeNode::set_uv_scale
set_uv_scale
Specifies an additional scaling factor to apply to generated UV's along the rope.
Definition ropeNode.h:144
RopeNode::set_curve
set_curve
Sets the particular curve represented by the RopeNode.
Definition ropeNode.h:140
RopeNode::set_use_vertex_color
set_use_vertex_color
Sets the "use vertex color" flag.
Definition ropeNode.h:147