rt300@0: //
rt300@0: //  3DboxGL.cpp
rt300@0: //  tweakathlon
rt300@0: //
rt300@0: //  Created by Robert Tubb on 17/04/2014.
rt300@0: //
rt300@0: //
rt300@0: 
rt300@0: #include "3DboxGL.h"
rt300@0: 
rt300@0: 
rt300@0: Leap3DBoxGL::Leap3DBoxGL(float ax,
rt300@0:                          float ay,
rt300@0:                          float awidth,
rt300@0:                          float aheight,
rt300@0:                          float azx,
rt300@0:                          float azy,
rt300@0:                          const UIProps& props) :
rt300@0: Leap3DBox(ax,ay,awidth, aheight, azx, azy, props)
rt300@0: {
rt300@0:     indicatorColor = ofColor(123, 123, 220);
rt300@0:     // how much to rotate the box
rt300@31:     angleX = -25; // elevation
rt300@32:     angleY = 0; // yaw
rt300@0:     
rt300@0:     depth = width; // its a cube
rt300@0:     
rt300@0:     // where is the camera
rt300@26:     camTrans = 250;
rt300@0:     
rt300@0:     // cube is centred on 0,0,0
rt300@0:     float I = width/2;
rt300@0:     float O = -width/2;
rt300@0:     
rt300@0:     // left face x=O
rt300@0:     // back face z=O
rt300@0:     // top face y=O
rt300@0:     
rt300@0:     // positions of vertices
rt300@0:     ofPoint ltf = ofPoint( O,O,I );
rt300@0:     ofPoint lbf = ofPoint( O,I,I );
rt300@0:     ofPoint rtf = ofPoint( I,O,I );
rt300@0:     ofPoint rbf = ofPoint( I,I,I );
rt300@0:     
rt300@0:     ofPoint ltr = ofPoint( O,O,O );
rt300@0:     ofPoint lbr = ofPoint( O,I,O );
rt300@0:     ofPoint rtr = ofPoint( I,O,O );
rt300@0:     ofPoint rbr = ofPoint( I,I,O );
rt300@0:     
rt300@0:     // now build faces
rt300@0:     // rear
rt300@32:     makeTexFace(&boxMesh,  rtr, ltr, lbr, rbr);
rt300@0:     
rt300@0:     
rt300@0: //    boxMesh.addVertex(ltr);
rt300@0: //    boxMesh.addVertex(rtr);
rt300@0: //    boxMesh.addVertex(rbr);
rt300@0: //    
rt300@0: //    boxMesh.addVertex(ltr);
rt300@0: //    boxMesh.addVertex(rbr);
rt300@0: //    boxMesh.addVertex(lbr);
rt300@0:     
rt300@32:     // left
rt300@32:     makeTexFace(&boxMesh,   ltr, ltf, lbf,lbr);
rt300@32:     
rt300@32: //    boxMesh.addVertex(ltf);
rt300@32: //    boxMesh.addVertex(ltr);
rt300@32: //    boxMesh.addVertex(lbr);
rt300@32: //    
rt300@32: //    boxMesh.addVertex(ltf);
rt300@32: //    boxMesh.addVertex(lbr);
rt300@32: //    boxMesh.addVertex(lbf);
rt300@32:     
rt300@32:     // bottom
rt300@32:     makeTexFace(&boxMesh,   lbr, lbf, rbf,rbr);
rt300@32:     
rt300@32: //    boxMesh.addVertex(lbf);
rt300@32: //    boxMesh.addVertex(lbr);
rt300@32: //    boxMesh.addVertex(rbr);
rt300@32: //    
rt300@32: //    boxMesh.addVertex(lbf);
rt300@32: //    boxMesh.addVertex(rbr);
rt300@32: //    boxMesh.addVertex(rbf);
rt300@32: 
rt300@32:     
rt300@0:     boxMesh.setupIndicesAuto();
rt300@25:     setNormals(boxMesh);
rt300@0: }
rt300@0: 
rt300@0: 
rt300@0: //--------------------------------------------------------------
rt300@0: 
rt300@0: void setNormals( ofMesh &mesh )
rt300@0: 
rt300@0: {
rt300@0:     //The number of the vertices
rt300@0:     int nV = mesh.getNumVertices();
rt300@0:     
rt300@0:     //The number of the triangles
rt300@0:     int nT = mesh.getNumIndices() / 3;
rt300@0:     
rt300@0:     vector<ofPoint> norm( nV );
rt300@0:     
rt300@0:     //Array for the normals
rt300@0:     //Scan all the triangles. For each triangle add its
rt300@0:     //normal to norm's vectors of triangle's vertices
rt300@0:     
rt300@0:     for (int t=0; t<nT; t++) {
rt300@0:         //Get indices of the triangle t
rt300@0:         int i1 = mesh.getIndex( 3 * t );
rt300@0:         int i2 = mesh.getIndex( 3 * t + 1 );
rt300@0:         int i3 = mesh.getIndex( 3 * t + 2 );
rt300@0:         
rt300@0:         //Get vertices of the triangle
rt300@0:         const ofPoint &v1 = mesh.getVertex( i1 );
rt300@0:         const ofPoint &v2 = mesh.getVertex( i2 );
rt300@0:         const ofPoint &v3 = mesh.getVertex( i3 );
rt300@0:         
rt300@0:         //Compute the triangle's normal
rt300@0:         ofPoint dir = ( (v2 - v1).crossed( v3 - v1 ) ).normalized();
rt300@0:         
rt300@0:         //Accumulate it to norm array for i1, i2, i3
rt300@0:         norm[ i1 ] += dir;
rt300@0:         norm[ i2 ] += dir;
rt300@0:         norm[ i3 ] += dir;
rt300@0:     }
rt300@0:     //Normalize the normal's length
rt300@0:     for (int i=0; i<nV; i++)
rt300@0:     {
rt300@0:         norm[i].normalize();
rt300@0:         
rt300@0:     }
rt300@0:     //Set the normals to mesh
rt300@0:     mesh.clearNormals();
rt300@0:     mesh.addNormals( norm );
rt300@0: }
rt300@0: 
rt300@0: // algs
rt300@0: