Changeset 407

Timestamp:

Apr 24, 2006 12:46:14 PM (18 years ago)

Author:

qiaow

Message:

Added 3 cut planes for each volume object

Location:

trunk/gui/vizservers/nanovis

Files:

• Makefile (modified) (1 diff)
• Volume.cpp (modified) (1 diff)
• Volume.h (modified) (2 diffs)
• VolumeRenderer.cpp (modified) (5 diffs)
• VolumeRenderer.h (modified) (1 diff)
• shaders/one_volume.cg (modified) (1 diff)

trunk/gui/vizservers/nanovis/Makefile

@@ -101 +101 @@
         gcc $(CFLAG) Lic.cpp
 
-Volume.o: Texture3D.o Volume.cpp $(AUXSRC)
+Volume.o: Texture3D.o Volume.cpp Volume.h $(AUXSRC)
         gcc $(CFLAG) Volume.cpp
 

trunk/gui/vizservers/nanovis/Volume.cpp

@@ -37 +37 @@
 
   location = Vector3(x,y,z);
+
+  //add cut planes
+  plane.clear();
+  plane.push_back(CutPlane(1, 0.5));
+  plane.push_back(CutPlane(2, 0.5));
+  plane.push_back(CutPlane(3, 0.5));
+  
 }
 

trunk/gui/vizservers/nanovis/Volume.h

@@ -17 +17 @@
 #define _VOLUME_H_
 
+#include <vector>
+
 #include "define.h"
 #include "Texture3D.h"
 #include "Vector3.h"
+
+using namespace std;
+
+struct CutPlane{
+  int orient;   //orientation - 1: xy slice, 2: yz slice, 3: xz slice
+  float offset; //normalized offset [0,1] in the volume
+
+  CutPlane(int _orient, float _offset):
+        orient(_orient),
+        offset(_offset){}
+};
+
 
 class Volume{
@@ -25 +39 @@
 public:
         Vector3 location;
+        vector <CutPlane> plane; //cut planes
 
         int width;

trunk/gui/vizservers/nanovis/VolumeRenderer.cpp

@@ -131 +131 @@
   glEnable(GL_DEPTH_TEST);
   glEnable(GL_BLEND);
-  
+
+  //render the cut planes
+  for(int i=0; i<volume[volume_index]->plane.size(); i++){
+    float offset = volume[volume_index]->plane[i].offset;
+    int axis = volume[volume_index]->plane[i].orient;
+
+    if(axis==1){
+      vert1 = Vector4(-10, -10, offset, 1);
+      vert2 = Vector4(-10, +10, offset, 1);
+      vert3 = Vector4(+10, +10, offset, 1);
+      vert4 = Vector4(+10, -10, offset, 1);
+    }
+    else if(axis==2){
+      vert1 = Vector4(offset, -10, -10, 1);
+      vert2 = Vector4(offset, +10, -10, 1);
+      vert3 = Vector4(offset, +10, +10, 1);
+      vert4 = Vector4(offset, -10, +10, 1);
+    }
+    else if(axis==3){
+      vert1 = Vector4(-10, offset, -10, 1);
+      vert2 = Vector4(+10, offset, -10, 1);
+      vert3 = Vector4(+10, offset, +10, 1);
+      vert4 = Vector4(-10, offset, +10, 1);
+    }
+
+    vert1 = model_view.transform(vert1);
+    vert2 = model_view.transform(vert2);
+    vert3 = model_view.transform(vert3);
+    vert4 = model_view.transform(vert4);
+
+    ConvexPolygon *poly;
+    poly = &staticPoly;
+    poly->vertices.clear();
+
+    poly->append_vertex(vert1);
+    poly->append_vertex(vert2);
+    poly->append_vertex(vert3);
+    poly->append_vertex(vert4);
+
+    for(int k=0; k<6; k++){
+      poly->clip(volume_planes[k]);
+    }
+
+    poly->copy_vertices_to_texcoords();
+    poly->transform(model_view_inverse);
+    poly->translate(shift_4d);
+    poly->transform(model_view);
+
+    glPushMatrix();
+    glScalef(volume[volume_index]->aspect_ratio_width, volume[volume_index]->aspect_ratio_height, volume[volume_index]->aspect_ratio_depth);
+
+    activate_one_volume_shader(volume_index, 1, 1);
+    glPopMatrix();
+
+    glBegin(GL_POLYGON);
+      poly->Emit(true); 
+    glEnd();
+
+    deactivate_one_volume_shader();
+  }
+
+#if 1 
   for (int i=0; i<n_actual_slices; i++){
     slice_z = zFar + i * z_step;        //back to front
@@ -181 +242 @@
     */
     
-    activate_one_volume_shader(volume_index, n_actual_slices);
+    activate_one_volume_shader(volume_index, n_actual_slices, 30);
     glPopMatrix();
 
@@ -191 +252 @@
                 
   }
+#endif
 
   glDisable(GL_BLEND);
@@ -248 +310 @@
 
 
-void VolumeRenderer::activate_one_volume_shader(int volume_index, int n_actual_slices){
+void VolumeRenderer::activate_one_volume_shader(int volume_index, int n_actual_slices, float scale){
 
   cgGLSetStateMatrixParameter(m_mvp_vert_std_param, CG_GL_MODELVIEW_PROJECTION_MATRIX, CG_GL_MATRIX_IDENTITY);
@@ -261 +323 @@
   cgGLEnableTextureParameter(m_tf_one_volume_param);
 
-  cgGLSetParameter4f(m_render_param_one_volume_param, n_actual_slices, 0., live_diffuse, live_specular);
+  cgGLSetParameter4f(m_render_param_one_volume_param, n_actual_slices, scale, live_diffuse, live_specular);
   cgGLBindProgram(m_one_volume_fprog);
   cgGLEnableProfile(CG_PROFILE_FP30);

trunk/gui/vizservers/nanovis/VolumeRenderer.h

@@ -63 +63 @@
   CGparameter m_mvi_vert_std_param;
 
-  void activate_one_volume_shader(int volume_index, int n_actual_slices);
+  void activate_one_volume_shader(int volume_index, int n_actual_slices, float opacity_scale);
   void deactivate_one_volume_shader();
 

trunk/gui/vizservers/nanovis/shaders/one_volume.cg

@@ -49 +49 @@
       //sample the transfer function texture
       float4 color = tex1D(tf, sample.x);
-      color.w = 30*color.w/renderParameters.x;
+      color.w = renderParameters.y*color.w/renderParameters.x;
 
       //float4 color = float4(sample.x, 0, 0, 1);