HDK: samples/GR/GR_BoundingBox.C Source File

00001 /*
00002  * Copyright (c) 2012
00003  *      Side Effects Software Inc.  All rights reserved.
00004  *
00005  * Redistribution and use of Houdini Development Kit samples in source and
00006  * binary forms, with or without modification, are permitted provided that the
00007  * following conditions are met:
00008  * 1. Redistributions of source code must retain the above copyright notice,
00009  *    this list of conditions and the following disclaimer.
00010  * 2. The name of Side Effects Software may not be used to endorse or
00011  *    promote products derived from this software without specific prior
00012  *    written permission.
00013  *
00014  * THIS SOFTWARE IS PROVIDED BY SIDE EFFECTS SOFTWARE `AS IS' AND ANY EXPRESS
00015  * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
00016  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN
00017  * NO EVENT SHALL SIDE EFFECTS SOFTWARE BE LIABLE FOR ANY DIRECT, INDIRECT,
00018  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
00019  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
00020  * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
00021  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
00022  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
00023  * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
00024  *
00025  *----------------------------------------------------------------------------
00026  */
00027 
00028 #include <UT/UT_DSOVersion.h>
00029 
00030 #include <RE/RE_Render.h>
00031 
00032 #include <GEO/GEO_Primitive.h>
00033 
00034 #include <GU/GU_Detail.h>
00035 #include <GU/GU_PrimGroupClosure.h>
00036 
00037 #include <GR/GR_Detail.h>
00038 #include <GR/GR_RenderHook.h>
00039 #include <GR/GR_RenderTable.h>
00040 #include <GR/GR_DisplayOption.h>
00041 
00042 namespace HDK_Sample {
00043 class GR_BoundingBox : public GR_RenderHook
00044 {
00045 public:
00046     GR_BoundingBox() {}
00047     virtual ~GR_BoundingBox() {}
00048 
00049     int          getWireMask(GU_Detail * /*gdp*/,
00050                              const GR_DisplayOption *dopt) const
00051     {
00052         // If hull display is on, we don't draw anything.
00053         if (dopt->drawPrimHulls())
00054             return 0;
00055         else
00056             return GEOPRIMALL;
00057     }
00058 
00059     virtual void renderWire(GU_Detail *gdp,
00060                         RE_Render &ren,
00061                         const GR_AttribOffset &ptinfo,
00062                         const GR_DisplayOption *dopt,
00063                         float lod,
00064                         const GU_PrimGroupClosure *hidden_geometry);
00065 
00066     int          getShadedMask(GU_Detail * /*gdp*/,
00067                              const GR_DisplayOption *dopt) const
00068     {
00069         // If hull display is on, we don't draw anything.
00070         if (dopt->drawPrimHulls())
00071             return 0;
00072         else
00073             return GEOPRIMALL;
00074     }
00075 
00076     virtual void renderShaded(GU_Detail *gdp,
00077                         RE_Render &ren,
00078                         const GR_AttribOffset &ptinfo,
00079                         const GR_DisplayOption *dopt,
00080                         float lod,
00081                         const GU_PrimGroupClosure *hidden_geometry);
00082 
00083     virtual const char *getName() const { return "GR_BoundingBox"; }
00084 };
00085 } // End HDK_Sample namespace
00086 using namespace HDK_Sample;
00087 
00088 void
00089 GR_BoundingBox::renderWire(GU_Detail *gdp,
00090                     RE_Render &ren,
00091                     const GR_AttribOffset & /*ptinfo*/,
00092                     const GR_DisplayOption *dopt,
00093                     float /*lod*/,
00094                     const GU_PrimGroupClosure *hidden_geometry)
00095 {
00096     if (!dopt->drawPrimHulls())
00097         return;
00098     
00099     UT_BoundingBox              bbox;
00100 
00101     // Find the bounding box of the visible geometry.
00102     gdp->getBBox(&bbox, 0, hidden_geometry);
00103 
00104     // And render that bounding box as wires.
00105     ren.beginLine();
00106 
00107     ren.vertex3DW(bbox(0, 0), bbox(1, 0), bbox(2, 0));
00108     ren.vertex3DW(bbox(0, 1), bbox(1, 0), bbox(2, 0));
00109     ren.vertex3DW(bbox(0, 1), bbox(1, 1), bbox(2, 0));
00110     ren.vertex3DW(bbox(0, 0), bbox(1, 1), bbox(2, 0));
00111     ren.vertex3DW(bbox(0, 0), bbox(1, 0), bbox(2, 0));
00112     ren.vertex3DW(bbox(0, 0), bbox(1, 0), bbox(2, 1));
00113     ren.vertex3DW(bbox(0, 0), bbox(1, 1), bbox(2, 1));
00114     ren.vertex3DW(bbox(0, 1), bbox(1, 1), bbox(2, 1));
00115     ren.vertex3DW(bbox(0, 1), bbox(1, 0), bbox(2, 1));
00116     ren.vertex3DW(bbox(0, 1), bbox(1, 0), bbox(2, 0));
00117 
00118     ren.endLine();
00119 
00120     // And last three lines.
00121     ren.beginLine();
00122 
00123     ren.vertex3DW(bbox(0, 0), bbox(1, 1), bbox(2, 0));
00124     ren.vertex3DW(bbox(0, 0), bbox(1, 1), bbox(2, 1));
00125 
00126     ren.endLine();
00127 
00128     ren.beginLine();
00129 
00130     ren.vertex3DW(bbox(0, 1), bbox(1, 1), bbox(2, 0));
00131     ren.vertex3DW(bbox(0, 1), bbox(1, 1), bbox(2, 1));
00132 
00133     ren.endLine();
00134     
00135     ren.beginLine();
00136 
00137     ren.vertex3DW(bbox(0, 0), bbox(1, 0), bbox(2, 1));
00138     ren.vertex3DW(bbox(0, 1), bbox(1, 0), bbox(2, 1));
00139 
00140     ren.endLine();
00141 }
00142 
00143 void
00144 GR_BoundingBox::renderShaded(GU_Detail *gdp,
00145                     RE_Render &ren,
00146                     const GR_AttribOffset & /*ptinfo*/,
00147                     const GR_DisplayOption *dopt,
00148                     float /*lod*/,
00149                     const GU_PrimGroupClosure *hidden_geometry)
00150 {
00151     // Only proceed if hull drawing is on.
00152     if (!dopt->drawPrimHulls())
00153         return;
00154     
00155     UT_BoundingBox              bbox;
00156     float                       nml[3];
00157     float                       cd[3];
00158 
00159     // Find the bounding box of the visible geometry.
00160     gdp->getBBox(&bbox, 0, hidden_geometry);
00161 
00162     // We want to override the colour with the wire colour.
00163     dopt->wireColor().getRGB(&cd[0], &cd[1], &cd[2]);
00164 
00165     // In order to have colour to show up, we need a diffuse material.
00166     ren.pushMaterialDiffuse();
00167 
00168     // Draw the cube:
00169 
00170     nml[0] = 0.0f;
00171     nml[1] = 0.0f;
00172     nml[2] = -1.0f;
00173 
00174     ren.beginPolygon(0);
00175         ren.n3DW(nml);
00176         ren.c3DW(cd);
00177         ren.vertex3DW(bbox(0, 0), bbox(1, 0), bbox(2, 0));
00178         ren.vertex3DW(bbox(0, 0), bbox(1, 1), bbox(2, 0));
00179         ren.vertex3DW(bbox(0, 1), bbox(1, 1), bbox(2, 0));
00180         ren.vertex3DW(bbox(0, 1), bbox(1, 0), bbox(2, 0));
00181     ren.endPolygon();
00182 
00183     nml[0] = 0.0f;
00184     nml[1] = 0.0f;
00185     nml[2] = 1.0f;
00186 
00187     ren.beginPolygon(0);
00188         ren.n3DW(nml);
00189         ren.c3DW(cd);
00190         ren.vertex3DW(bbox(0, 0), bbox(1, 0), bbox(2, 1));
00191         ren.vertex3DW(bbox(0, 1), bbox(1, 0), bbox(2, 1));
00192         ren.vertex3DW(bbox(0, 1), bbox(1, 1), bbox(2, 1));
00193         ren.vertex3DW(bbox(0, 0), bbox(1, 1), bbox(2, 1));
00194     ren.endPolygon();
00195 
00196     nml[0] = 0.0f;
00197     nml[1] = -1.0f;
00198     nml[2] = 0.0f;
00199 
00200     ren.beginPolygon(0);
00201         ren.n3DW(nml);
00202         ren.c3DW(cd);
00203         ren.vertex3DW(bbox(0, 0), bbox(1, 0), bbox(2, 0));
00204         ren.vertex3DW(bbox(0, 1), bbox(1, 0), bbox(2, 0));
00205         ren.vertex3DW(bbox(0, 1), bbox(1, 0), bbox(2, 1));
00206         ren.vertex3DW(bbox(0, 0), bbox(1, 0), bbox(2, 1));
00207     ren.endPolygon();
00208 
00209     nml[0] = 0.0f;
00210     nml[1] = 1.0f;
00211     nml[2] = 0.0f;
00212 
00213     ren.beginPolygon(0);
00214         ren.n3DW(nml);
00215         ren.c3DW(cd);
00216         ren.vertex3DW(bbox(0, 0), bbox(1, 1), bbox(2, 0));
00217         ren.vertex3DW(bbox(0, 0), bbox(1, 1), bbox(2, 1));
00218         ren.vertex3DW(bbox(0, 1), bbox(1, 1), bbox(2, 1));
00219         ren.vertex3DW(bbox(0, 1), bbox(1, 1), bbox(2, 0));
00220     ren.endPolygon();
00221 
00222     nml[0] = -1.0f;
00223     nml[1] = 0.0f;
00224     nml[2] = 0.0f;
00225 
00226     ren.beginPolygon(0);
00227         ren.n3DW(nml);
00228         ren.c3DW(cd);
00229         ren.vertex3DW(bbox(0, 0), bbox(1, 0), bbox(2, 0));
00230         ren.vertex3DW(bbox(0, 0), bbox(1, 0), bbox(2, 1));
00231         ren.vertex3DW(bbox(0, 0), bbox(1, 1), bbox(2, 1));
00232         ren.vertex3DW(bbox(0, 0), bbox(1, 1), bbox(2, 0));
00233     ren.endPolygon();
00234 
00235     nml[0] = 1.0f;
00236     nml[1] = 0.0f;
00237     nml[2] = 0.0f;
00238 
00239     ren.beginPolygon(0);
00240         ren.n3DW(nml);
00241         ren.c3DW(cd);
00242         ren.vertex3DW(bbox(0, 1), bbox(1, 0), bbox(2, 0));
00243         ren.vertex3DW(bbox(0, 1), bbox(1, 1), bbox(2, 0));
00244         ren.vertex3DW(bbox(0, 1), bbox(1, 1), bbox(2, 1));
00245         ren.vertex3DW(bbox(0, 1), bbox(1, 0), bbox(2, 1));
00246     ren.endPolygon();
00247 
00248     ren.popMaterialDiffuse();
00249 }
00250 
00251 void
00252 newRenderHook(GR_RenderTable *table)
00253 {
00254     GR_BoundingBox *hook = new GR_BoundingBox;
00255     
00256     table->addHook(hook);
00257 }