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25 //
26 //
27 //
28 //
29 // Andrew Walkden 10th February 1997
30 // OpenGL immediate scene - draws immediately to buffer
31 // (saving space on server).
32
33 #include "G4OpenGLImmediateSceneHandler.hh"
34
35 #include "G4OpenGLViewer.hh"
36 #include "G4OpenGLTransform3D.hh"
37 #include "G4Polyline.hh"
38 #include "G4Polymarker.hh"
39 #include "G4Text.hh"
40 #include "G4Circle.hh"
41 #include "G4Square.hh"
42 #include "G4Polyhedron.hh"
43 #include "G4AttHolder.hh"
44
45 #include <typeinfo>
46
47 G4OpenGLImmediateSceneHandler::G4OpenGLImmediateSceneHandler
48 (G4VGraphicsSystem& system,const G4String& name):
49 G4OpenGLSceneHandler (system, fSceneIdCount++, name)
50 {}
51
52 G4OpenGLImmediateSceneHandler::~G4OpenGLImmediateSceneHandler ()
53 {}
54
55 #include <iomanip>
56
57 G4bool G4OpenGLImmediateSceneHandler::AddPrimitivePreamble(const G4VMarker& visible)
58 {
59 return AddPrimitivePreambleInternal(visible, true, false);
60 }
61 G4bool G4OpenGLImmediateSceneHandler::AddPrimitivePreamble(const G4Polyline& visible)
62 {
63 return AddPrimitivePreambleInternal(visible, false, true);
64 }
65 G4bool G4OpenGLImmediateSceneHandler::AddPrimitivePreamble(const G4Polyhedron& visible)
66 {
67 return AddPrimitivePreambleInternal(visible, false, false);
68 }
69
70 G4bool G4OpenGLImmediateSceneHandler::AddPrimitivePreambleInternal(const G4Visible& visible, bool isMarker, bool isPolyline)
71 {
72 // Get applicable vis attributes for all primitives.
73 fpVisAttribs = fpViewer->GetApplicableVisAttributes(visible.GetVisAttributes());
74 const G4Colour& c = GetColour ();
75 G4double opacity = c.GetAlpha ();
76
77 G4bool transparency_enabled = true;
78 G4bool isMarkerNotHidden = true;
79 G4OpenGLViewer* pViewer = dynamic_cast<G4OpenGLViewer*>(fpViewer);
80 if (pViewer) {
81 transparency_enabled = pViewer->transparency_enabled;
82 isMarkerNotHidden = pViewer->fVP.IsMarkerNotHidden();
83 }
84
85 G4bool isMarkerOrPolyline = isMarker || isPolyline;
86 G4bool treatAsTransparent = transparency_enabled && opacity < 1.;
87 G4bool treatAsNotHidden = isMarkerNotHidden && (isMarker || isPolyline);
88
89 if (fProcessing2D) glDisable (GL_DEPTH_TEST);
90 else {
91 if (isMarkerOrPolyline && isMarkerNotHidden)
92 glDisable (GL_DEPTH_TEST);
93 else {glEnable (GL_DEPTH_TEST); glDepthFunc (GL_LEQUAL);}
94 }
95
96 if (fThreePassCapable) {
97
98 // Ensure transparent objects are drawn opaque ones and before
99 // non-hidden markers. The problem of blending/transparency/alpha
100 // is quite a tricky one - see History of opengl-V07-01-01/2/3.
101 if (!(fSecondPassForTransparency || fThirdPassForNonHiddenMarkers)) {
102 // First pass...
103 if (treatAsTransparent) { // Request pass for transparent objects...
104 fSecondPassForTransparencyRequested = true;
105 }
106 if (treatAsNotHidden) { // Request pass for non-hidden markers...
107 fThirdPassForNonHiddenMarkersRequested = true;
108 }
109 // On first pass, transparent objects and non-hidden markers are not drawn...
110 if (treatAsTransparent || treatAsNotHidden) {
111 return false;
112 }
113 }
114
115 // On second pass, only transparent objects are drawn...
116 if (fSecondPassForTransparency) {
117 if (!treatAsTransparent) {
118 return false;
119 }
120 }
121
122 // On third pass, only non-hidden markers are drawn...
123 if (fThirdPassForNonHiddenMarkers) {
124 if (!treatAsNotHidden) {
125 return false;
126 }
127 }
128 } // fThreePassCapable
129
130 // Loads G4Atts for picking...
131 if (fpViewer->GetViewParameters().IsPicking()) {
132 glLoadName(++fPickName);
133 G4AttHolder* holder = new G4AttHolder;
134 LoadAtts(visible, holder);
135 fPickMap[fPickName] = holder;
136 }
137
138 if (transparency_enabled) {
139 glColor4d(c.GetRed(),c.GetGreen(),c.GetBlue(),c.GetAlpha());
140 } else {
141 glColor3d(c.GetRed(),c.GetGreen(),c.GetBlue());
142 }
143
144 return true;
145 }
146
147 void G4OpenGLImmediateSceneHandler::AddPrimitive (const G4Polyline& polyline)
148 {
149 G4bool furtherprocessing = AddPrimitivePreamble(polyline);
150 if (furtherprocessing) {
151 G4OpenGLSceneHandler::AddPrimitive(polyline);
152 }
153 }
154
155 void G4OpenGLImmediateSceneHandler::AddPrimitive (const G4Polymarker& polymarker)
156 {
157 G4bool furtherprocessing = AddPrimitivePreamble(polymarker);
158 if (furtherprocessing) {
159 G4OpenGLSceneHandler::AddPrimitive(polymarker);
160 }
161 }
162
163 void G4OpenGLImmediateSceneHandler::AddPrimitive (const G4Text& text)
164 {
165 // Note: colour is still handled in
166 // G4OpenGLSceneHandler::AddPrimitive(const G4Text&).
167 G4bool furtherprocessing = AddPrimitivePreamble(text);
168 if (furtherprocessing) {
169 G4OpenGLSceneHandler::AddPrimitive(text);
170 }
171 }
172
173 void G4OpenGLImmediateSceneHandler::AddPrimitive (const G4Circle& circle)
174 {
175 G4bool furtherprocessing = AddPrimitivePreamble(circle);
176 if (furtherprocessing) {
177 G4OpenGLSceneHandler::AddPrimitive(circle);
178 }
179 }
180
181 void G4OpenGLImmediateSceneHandler::AddPrimitive (const G4Square& square)
182 {
183 G4bool furtherprocessing = AddPrimitivePreamble(square);
184 if (furtherprocessing) {
185 G4OpenGLSceneHandler::AddPrimitive(square);
186 }
187 }
188
189 void G4OpenGLImmediateSceneHandler::AddPrimitive (const G4Polyhedron& polyhedron)
190 {
191 // Note: colour is still handled in
192 // G4OpenGLSceneHandler::AddPrimitive(const G4Polyhedron&).
193 G4bool furtherprocessing = AddPrimitivePreamble(polyhedron);
194 if (furtherprocessing) {
195 G4OpenGLSceneHandler::AddPrimitive(polyhedron);
196 }
197 }
198
199 void G4OpenGLImmediateSceneHandler::BeginPrimitives
200 (const G4Transform3D& objectTransformation)
201 {
202 G4OpenGLSceneHandler::BeginPrimitives (objectTransformation);
203
204 G4OpenGLTransform3D oglt (objectTransformation);
205
206 glPushMatrix();
207
208 /*************************** Check matrix.
209 const GLdouble* m = oglt.GetGLMatrix ();
210 G4cout << "G4OpenGLTransform3D matrix:";
211 for (int i = 0; i < 16; i++) {
212 if ((i % 4) == 0) G4cout << '\n';
213 G4cout << std::setw (15) << m[i];
214 }
215 G4cout << G4endl;
216 *****************************************/
217
218 glMultMatrixd (oglt.GetGLMatrix ());
219 }
220
221 void G4OpenGLImmediateSceneHandler::EndPrimitives ()
222 {
223 glPopMatrix();
224
225 // See all primitives immediately... At least soon...
226 ScaledFlush();
227
228 G4OpenGLSceneHandler::EndPrimitives ();
229 }
230
231 void G4OpenGLImmediateSceneHandler::BeginPrimitives2D
232 (const G4Transform3D& objectTransformation)
233 {
234 G4OpenGLSceneHandler::BeginPrimitives2D(objectTransformation);
235
236 // Push current 3D world matrices and load identity to define screen
237 // coordinates...
238 glMatrixMode (GL_PROJECTION);
239 glPushMatrix();
240 glLoadIdentity();
241 G4OpenGLViewer* pViewer = dynamic_cast<G4OpenGLViewer*>(fpViewer);
242 if (pViewer) {
243 pViewer->g4GlOrtho (-1., 1., -1., 1., -G4OPENGL_FLT_BIG, G4OPENGL_FLT_BIG);
244 }
245 glMatrixMode (GL_MODELVIEW);
246 glPushMatrix();
247 glLoadIdentity();
248 G4OpenGLTransform3D oglt (objectTransformation);
249 glMultMatrixd (oglt.GetGLMatrix ());
250 glDisable(GL_DEPTH_TEST); // But see parent scene handler!! In
251 glDisable (GL_LIGHTING); // some cases, we need to re-iterate this.
252 }
253
254 void G4OpenGLImmediateSceneHandler::EndPrimitives2D()
255 {
256 // Pop current 3D world matrices back again...
257 glMatrixMode (GL_PROJECTION);
258 glPopMatrix();
259 glMatrixMode (GL_MODELVIEW);
260 glPopMatrix();
261
262 // See all primitives immediately... At least soon...
263 ScaledFlush();
264
265 G4OpenGLSceneHandler::EndPrimitives2D ();
266 }
267
268 void G4OpenGLImmediateSceneHandler::BeginModeling () {
269 G4VSceneHandler::BeginModeling();
270 }
271
272 void G4OpenGLImmediateSceneHandler::EndModeling () {
273 G4VSceneHandler::EndModeling ();
274 }
275
276 void G4OpenGLImmediateSceneHandler::ClearTransientStore ()
277 {
278 // Nothing to do except redraw the scene ready for the next event.
279 if (fpViewer) {
280 fpViewer -> SetView ();
281 fpViewer -> ClearView ();
282 fpViewer -> DrawView ();
283 }
284 }
285
286 G4int G4OpenGLImmediateSceneHandler::fSceneIdCount = 0;
287