contrib/bobtoolz/DBobView.cpp

   1 /*
   2 BobToolz plugin for GtkRadiant
   3 Copyright (C) 2001 Gordon Biggans
   4
   5 This library is free software; you can redistribute it and/or
   6 modify it under the terms of the GNU Lesser General Public
   7 License as published by the Free Software Foundation; either
   8 version 2.1 of the License, or (at your option) any later version.
   9
  10 This library is distributed in the hope that it will be useful,
  11 but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13 Lesser General Public License for more details.
  14
  15 You should have received a copy of the GNU Lesser General Public
  16 License along with this library; if not, write to the Free Software
  17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  18 */
  19
  20 // BobView.cpp: implementation of the DBobView class.
  21 //
  22 //////////////////////////////////////////////////////////////////////
  23
  24 #include "DBobView.h"
  25 //#include "misc.h"
  26 #include "funchandlers.h"
  27
  28 #include <list>
  29
  30 #include "iglrender.h"
  31 #include "qerplugin.h"
  32 #include "str.h"
  33 #include "math/matrix.h"
  34
  35 #include "DEntity.h"
  36 #include "DEPair.h"
  37 #include "misc.h"
  38 #include "dialogs/dialogs-gtk.h"
  39
  40 //////////////////////////////////////////////////////////////////////
  41 // Construction/Destruction
  42 //////////////////////////////////////////////////////////////////////
  43
  44 DBobView::DBobView()
  45 {
  46         nPathCount = 0;
  47
  48         path = NULL;
  49
  50         boundingShow = BOUNDS_APEX;
  51
  52   constructShaders();
  53   GlobalShaderCache().attachRenderable(*this);
  54 }
  55
  56 DBobView::~DBobView()
  57 {
  58   GlobalShaderCache().detachRenderable(*this);
  59   destroyShaders();
  60
  61   if(path)
  62                 delete[] path;
  63
  64         g_PathView = NULL;
  65 }
  66
  67 //////////////////////////////////////////////////////////////////////
  68 // Implementation
  69 //////////////////////////////////////////////////////////////////////
  70
  71 void DBobView::render(RenderStateFlags state) const
  72 {
  73         glBegin(GL_LINE_STRIP);
  74
  75         for(int i = 0; i < nPathCount; i++)
  76                 glVertex3fv(path[i]);
  77
  78         glEnd();
  79 }
  80
  81 const char* DBobView_state_line = "$bobtoolz/bobview/line";
  82 const char* DBobView_state_box = "$bobtoolz/bobview/box";
  83
  84 void DBobView::constructShaders()
  85 {
  86   OpenGLState state;
  87   GlobalOpenGLStateLibrary().getDefaultState(state);
  88   state.m_state = RENDER_COLOURWRITE|RENDER_DEPTHWRITE|RENDER_BLEND|RENDER_LINESMOOTH;
  89   state.m_sort = OpenGLState::eSortOpaque;
  90   state.m_linewidth = 1;
  91   state.m_colour[0] = 1;
  92   state.m_colour[1] = 0;
  93   state.m_colour[2] = 0;
  94   state.m_colour[3] = 1;
  95   GlobalOpenGLStateLibrary().insert(DBobView_state_line, state);
  96
  97   state.m_colour[0] = 0.25f;
  98   state.m_colour[1] = 0.75f;
  99   state.m_colour[2] = 0.75f;
 100   state.m_colour[3] = 1;
 101   GlobalOpenGLStateLibrary().insert(DBobView_state_box, state);
 102
 103   m_shader_line = GlobalShaderCache().capture(DBobView_state_line);
 104   m_shader_box = GlobalShaderCache().capture(DBobView_state_box);
 105 }
 106
 107 void DBobView::destroyShaders()
 108 {
 109   GlobalOpenGLStateLibrary().erase(DBobView_state_line);
 110   GlobalOpenGLStateLibrary().erase(DBobView_state_box);
 111   GlobalShaderCache().release(DBobView_state_line);
 112   GlobalShaderCache().release(DBobView_state_box);
 113 }
 114
 115 Matrix4 g_transform_box1 = matrix4_translation_for_vec3(Vector3(16.0f, 16.0f, 28.0f));
 116 Matrix4 g_transform_box2 = matrix4_translation_for_vec3(Vector3(-16.0f, 16.0f, 28.0f));
 117 Matrix4 g_transform_box3 = matrix4_translation_for_vec3(Vector3(16.0f, -16.0f, -28.0f));
 118 Matrix4 g_transform_box4 = matrix4_translation_for_vec3(Vector3(-16.0f, -16.0f, -28.0f));
 119
 120 void DBobView::renderSolid(Renderer& renderer, const VolumeTest& volume) const
 121 {
 122         if(!path)
 123                 return;
 124
 125   renderer.SetState(m_shader_line, eWireframeOnly);
 126   renderer.SetState(m_shader_line, eFullMaterials);
 127   renderer.addRenderable(*this, g_matrix4_identity);
 128
 129         if(m_bShowExtra)
 130         {
 131     renderer.SetState(m_shader_box, eWireframeOnly);
 132     renderer.SetState(m_shader_box, eFullMaterials);
 133     renderer.addRenderable(*this, g_transform_box1);
 134     renderer.addRenderable(*this, g_transform_box2);
 135     renderer.addRenderable(*this, g_transform_box3);
 136     renderer.addRenderable(*this, g_transform_box4);
 137   }
 138 }
 139 void DBobView::renderWireframe(Renderer& renderer, const VolumeTest& volume) const
 140 {
 141   renderSolid(renderer, volume);
 142 }
 143
 144 void DBobView::SetPath(vec3_t *pPath)
 145 {
 146         if(path)
 147                 delete[] path;
 148
 149         path = pPath;
 150 }
 151
 152 #define LOCAL_GRAVITY -800.0f
 153
 154 bool DBobView::CalculateTrajectory(vec3_t start, vec3_t apex, float multiplier, int points, float varGravity)
 155 {
 156         if(apex[2] <= start[2])
 157         {
 158                 SetPath(NULL);
 159                 return false;
 160         }
 161         // ----think q3a actually would allow these
 162         //scrub that, coz the plugin wont :]
 163
 164         vec3_t dist, speed;
 165         VectorSubtract(apex, start, dist);
 166
 167         vec_t speed_z = (float)sqrt(-2*LOCAL_GRAVITY*dist[2]);
 168         float flight_time = -speed_z/LOCAL_GRAVITY;
 169
 170
 171         VectorScale(dist, 1/flight_time, speed);
 172         speed[2] = speed_z;
 173
 174 //      Sys_Printf("Speed: (%.4f %.4f %.4f)\n", speed[0], speed[1], speed[2]);
 175
 176         vec3_t* pPath = new vec3_t[points];
 177
 178         float interval = multiplier*flight_time/points;
 179         for(int i = 0; i < points; i++)
 180         {
 181                 float ltime = interval*i;
 182
 183                 VectorScale(speed, ltime, pPath[i]);
 184                 VectorAdd(pPath[i], start, pPath[i]);
 185
 186                 // could do this all with vectors
 187                 // vGrav = {0, 0, -800.0f}
 188                 // VectorScale(vGrav, 0.5f*ltime*ltime, vAdd);
 189                 // VectorScale(speed, ltime, pPath[i]);
 190                 // _VectorAdd(pPath[i], start, pPath[i])
 191                 // _VectorAdd(pPath[i], vAdd, pPath[i])
 192
 193                 pPath[i][2] = start[2] + (speed_z*ltime) + (varGravity*0.5f*ltime*ltime);
 194         }
 195
 196         SetPath(pPath);
 197         return true;
 198 }
 199
 200 void DBobView::Begin(const char* trigger, const char *target, float multiplier, int points, float varGravity, bool bNoUpdate, bool bShowExtra)
 201 {
 202         strcpy(entTrigger, trigger);
 203         strcpy(entTarget, target);
 204
 205         fMultiplier = multiplier;
 206         fVarGravity = varGravity;
 207         nPathCount = points;
 208         m_bShowExtra = bShowExtra;
 209
 210         if(!UpdatePath())
 211         {
 212                 globalErrorStream() << "Initialization Failure in DBobView::Begin";
 213                 delete this;
 214         }
 215 }
 216
 217 bool DBobView::UpdatePath()
 218 {
 219         vec3_t start, apex;
 220
 221         if(GetEntityCentre(entTrigger, start))
 222         {
 223                 if(GetEntityCentre(entTarget, apex))
 224                 {
 225                         CalculateTrajectory(start, apex, fMultiplier, nPathCount, fVarGravity);
 226                         return true;
 227                 }
 228         }
 229         return false;
 230 }
 231
 232 void DBobView_setEntity(Entity& entity, float multiplier, int points, float varGravity, bool bNoUpdate, bool bShowExtra)
 233 {
 234         DEntity trigger;
 235         trigger.LoadEPairList(&entity);
 236
 237         DEPair* trigger_ep = trigger.FindEPairByKey("targetname");
 238
 239         if(trigger_ep)
 240         {
 241                 if(!strcmp(trigger.m_Classname, "trigger_push"))
 242                 {
 243                         DEPair* target_ep = trigger.FindEPairByKey("target");
 244                         if(target_ep)
 245                         {
 246         scene::Path* entTarget = FindEntityFromTargetname(target_ep->value, NULL);
 247                                 if(entTarget)
 248                                 {
 249                                         if(g_PathView)
 250                                                 delete g_PathView;
 251                                         g_PathView = new DBobView;
 252
 253           Entity* target = Node_getEntity(entTarget->top());
 254           if(target != 0)
 255           {
 256             if(!bNoUpdate)
 257             {
 258               g_PathView->trigger = &entity;
 259               entity.attach(*g_PathView);
 260               g_PathView->target = target;
 261               target->attach(*g_PathView);
 262             }
 263                                           g_PathView->Begin(trigger_ep->value, target_ep->value, multiplier, points, varGravity, bNoUpdate, bShowExtra);
 264           }
 265                                 }
 266                                 else
 267                                         DoMessageBox("trigger_push target could not be found.", "Error", eMB_OK);
 268                         }
 269                         else
 270                                 DoMessageBox("trigger_push has no target.", "Error", eMB_OK);
 271                 }
 272                 else
 273                         DoMessageBox("You must select a 'trigger_push' entity.", "Error", eMB_OK);
 274         }
 275         else
 276                 DoMessageBox("Entity must have a targetname", "Error", eMB_OK);
 277 }