１２．「面はすべて同一のマテリアル設定」ではないモデルファイルの描画に対応する

１１．で作成したモデルビューワは、モデルファイルの面はすべて同一のマテリアル設定としていました。
マテリアル設定が同一である面の集まりに対してグループというデータ構造を用意し、モデルはグループの集まりであるとするデータ構造を用意することで、「面はすべて同一のマテリアル設定」ではないモデルファイルの描画に対応します。
ついでに、頂点法線ベクトルデータ、面法線ベクトルデータも保持するようにモデルデータ構造を変更します。

実行形式ファイルダウンロード (ModelViewer9_exe.lzh)

ソースファイルダウンロード (ModelViewer9_src.lzh)

プロジェクトを開く

１１．で作成したモデルビューワプロジェクトを開きます。

モデルに関するデータ構造の変更

マテリアルデータ構造の追加、グループデータ構造の追加、モデルデータ構造の変更等のモデルに関するデータ構造の変更を行ないます。

ModelDataStructure.hの内容を以下のようにします。

// // ModelDataStructure.h // #ifndef _MODELDATASTRUCTURE_H #define _MODELDATASTRUCTURE_H #include <vector> class CVertex { public: CVertex() : x(0), y(0), z(0) {} CVertex( float a, float b, float c ) : x(a), y(b), z(c) {} float x, y, z; }; typedef CVertex CVector; class CIndexedTriangle { public: CIndexedTriangle() { ui3IndexVertex[0] = -1; ui3IndexVertex[1] = -1; ui3IndexVertex[2] = -1; ui3IndexVertexNormal[0] = -1; ui3IndexVertexNormal[1] = -1; ui3IndexVertexNormal[2] = -1; uiIndexFacetNormal = -1; } unsigned int ui3IndexVertex[3]; // 頂点番号 unsigned int ui3IndexVertexNormal[3]; // 頂点法線番号 unsigned int uiIndexFacetNormal; // 面法線番号 }; class CMaterial { public: CMaterial() { f4Ambient[0] = 0.2f; f4Ambient[1] = 0.2f; f4Ambient[2] = 0.2f; f4Ambient[3] = 1.0f; f4Diffuse[0] = 0.8f; f4Diffuse[1] = 0.8f; f4Diffuse[2] = 0.8f; f4Diffuse[3] = 1.0f; f4Specular[0] = 0.0f; f4Specular[1] = 0.0f; f4Specular[2] = 0.0f; f4Specular[3] = 1.0f; fShininess = 0.0f; } public: float f4Ambient[4]; float f4Diffuse[4]; float f4Specular[4]; float fShininess; std::string strName; }; class CGroup { public: std::string strName; // グループ名 std::vector<unsigned int> vuiIndexIndexedTriangle; // 三角形番号配列 CMaterial material; // マテリアル }; class CModel { public: virtual ~CModel() { Clear(); } public: std::vector<CVertex> vVertex; // 頂点配列 std::vector<CVector> vVectorVertexNormal; // 頂点法線配列 std::vector<CVector> vVectorFacetNormal; // 面法線配列 std::vector<CIndexedTriangle> vIndexedTriangle; // 三角形配列 std::vector<CGroup*> vpGroup; // グループ配列 void Clear() { vVertex.clear(); vVectorVertexNormal.clear(); vVectorFacetNormal.clear(); vIndexedTriangle.clear(); for( unsigned int ui = 0; ui < vpGroup.size(); ui++ ) { CGroup* pGroup = vpGroup[ui]; delete pGroup; } vpGroup.clear(); } const CModel& operator = ( const CModel& model ) { Clear(); vVertex = model.vVertex; vVectorVertexNormal = model.vVectorVertexNormal; vVectorFacetNormal = model.vVectorFacetNormal; vIndexedTriangle = model.vIndexedTriangle; vpGroup.assign( model.vpGroup.size(), NULL ); for( unsigned int ui = 0; ui < vpGroup.size(); ui++ ) { vpGroup[ui] = new CGroup( *model.vpGroup[ui] ); } return *this; } }; #endif //_MODELDATASTRUCTURE_H

ビルドし、エラー、警告がないことを確認します。

ファイル読み込み処理の変更

データ構造の変更にあわせて、ファイル読み込み処理を、変更後のデータ構造に対応したものへ変更します。

LoadModel関数の内容を以下のようにします。

BOOL LoadModel( LPCSTR pszFileName, CModel& model ) { if( NULL == pszFileName ) { return FALSE; } CStdioFile file( pszFileName, CFile::modeRead | CFile::typeText ); if( NULL == file.m_pStream ) { return FALSE; } // 要素の数を数える（三角形の数） unsigned int uiCountTriangle = 0; while( 1 ) { char szReadString[READSTRINGBUFFERLEN]; if( NULL == fgets( szReadString, READSTRINGBUFFERLEN, file.m_pStream ) ) { break; } const char cszDelimiter[] = ", \r\n\t"; char* pszToken = _tcstok( szReadString, cszDelimiter ); if( NULL == pszToken ) { continue; } if( 0 == _tcsicmp( pszToken, "facet" ) ) { uiCountTriangle++; continue; } } rewind( file.m_pStream ); if( 0 == uiCountTriangle ) { return FALSE; } model.vVertex.assign( uiCountTriangle * 3, CVertex() ); model.vVectorFacetNormal.assign( uiCountTriangle, CVector() ); model.vIndexedTriangle.assign( uiCountTriangle, CIndexedTriangle() ); unsigned int ui3 = 0; unsigned int uiIndexTriangle = 0; unsigned int uiIndexVertex = 0; while( 1 ) { char szReadString[READSTRINGBUFFERLEN]; if( NULL == fgets( szReadString, READSTRINGBUFFERLEN, file.m_pStream ) ) { break; } const char cszDelimiter[] = ", \r\n\t"; char* pszToken = _tcstok( szReadString, cszDelimiter ); if( NULL == pszToken ) { continue; } if( ('v' == pszToken[0] || 'V' == pszToken[0]) && (0 == _tcsicmp( pszToken, "vertex" )) ) { if( 3 <= ui3 ) { continue; } pszToken = _tcstok( NULL, cszDelimiter ); model.vVertex[uiIndexVertex].x = (float)atof( pszToken ); pszToken = _tcstok( NULL, cszDelimiter ); model.vVertex[uiIndexVertex].y = (float)atof( pszToken ); pszToken = _tcstok( NULL, cszDelimiter ); model.vVertex[uiIndexVertex].z = (float)atof( pszToken ); model.vIndexedTriangle[uiIndexTriangle].ui3IndexVertex[ui3] = uiIndexVertex; uiIndexVertex++; ui3++; continue; } else if( ('f' == pszToken[0] || 'F' == pszToken[0]) && (0 == _tcsicmp( pszToken, "facet" )) ) { // 面法線ベクトル ui3 = 0; continue; } else if( ('e' == pszToken[0] || 'E' == pszToken[0]) && (0 == _tcsicmp( pszToken, "endfacet" )) ) { // 面法線ベクトル CVertex* pVertex0 = &model.vVertex[ model.vIndexedTriangle[uiIndexTriangle].ui3IndexVertex[0] ]; CVertex* pVertex1 = &model.vVertex[ model.vIndexedTriangle[uiIndexTriangle].ui3IndexVertex[1] ]; CVertex* pVertex2 = &model.vVertex[ model.vIndexedTriangle[uiIndexTriangle].ui3IndexVertex[2] ]; float f3Vector01[3] = { pVertex1->x - pVertex0->x, pVertex1->y - pVertex0->y, pVertex1->z - pVertex0->z, }; float f3Vector12[3] = { pVertex2->x - pVertex1->x, pVertex2->y - pVertex1->y, pVertex2->z - pVertex1->z, }; float f3NormalVector[3] = { f3Vector01[1] * f3Vector12[2] - f3Vector01[2] * f3Vector12[1], f3Vector01[2] * f3Vector12[0] - f3Vector01[0] * f3Vector12[2], f3Vector01[0] * f3Vector12[1] - f3Vector01[1] * f3Vector12[0] }; model.vVectorFacetNormal[uiIndexTriangle] = CVector( f3NormalVector[0], f3NormalVector[1], f3NormalVector[2] ); model.vIndexedTriangle[uiIndexTriangle].uiIndexFacetNormal = uiIndexTriangle; model.vpGroup[0]->vuiIndexIndexedTriangle[uiIndexTriangle] = uiIndexTriangle; uiIndexTriangle++; continue; } else if( ('s' == pszToken[0] || 'S' == pszToken[0]) && (0 == _tcsicmp( pszToken, "solid" )) ) { // ソリッド名 CGroup* pGroup_new = new CGroup; pGroup_new->vuiIndexIndexedTriangle.assign( uiCountTriangle, 0 ); float f4Ambient[4] = { 0.25f, 0.20725f, 0.20725f, 1.0f }; float f4Diffuse[4] = { 1.0f, 0.829f, 0.829f, 1.0f }; float f4Specular[4] = { 0.296648f, 0.296648f, 0.296648f, 1.0f }; float fShininess = 0.088f; memcpy( pGroup_new->material.f4Ambient, f4Ambient, 4 * sizeof(float) ); memcpy( pGroup_new->material.f4Diffuse, f4Diffuse, 4 * sizeof(float) ); memcpy( pGroup_new->material.f4Specular, f4Specular, 4 * sizeof(float) ); pGroup_new->material.fShininess = fShininess; model.vpGroup.push_back( pGroup_new ); continue; } } if( 0 == model.vVertex.size() || 0 == model.vIndexedTriangle.size() ) { return FALSE; } return TRUE; }

ビルドし、エラー、警告がないことを確認します。

描画処理の変更

データ構造の変更にあわせて、描画処理を、変更後のデータ構造に対応したものへ変更します。

CModelViewerView::RenderObjects関数の内容を以下のようにします。

void CModelViewerView::RenderObjects( ERENDERMODE eRenderMode, const unsigned int* auiName ) { unsigned int uiIndexTriangle; unsigned int ui3; unsigned int uiIndexGroup; unsigned int uiIndexIndexedTriangle; unsigned int uiIndexFacetNormal; unsigned int uiIndexVertex0; unsigned int uiIndexVertex1; unsigned int uiIndexVertex2; switch( eRenderMode ) { case RM_RENDER: case RM_PICK: ::glPushAttrib( GL_ALL_ATTRIB_BITS ); { if( m_bRenderFace && !(RM_PICK==eRenderMode && !m_bPickFace) ) { // 面 if( RM_RENDER == eRenderMode ) { // 通常描画 if( 0 == m_uiDisplayListIndex_Face ) { m_uiDisplayListIndex_Face = ::glGenLists( 1 ); ::glNewList( m_uiDisplayListIndex_Face, GL_COMPILE ); ::glEnable( GL_LIGHTING ); // 光源の効果を有効にする。 ::glEnable( GL_NORMALIZE ); // OpenGL側で法線ベクトルを単位法線ベクトル化するようにする ::glLightModeli( GL_LIGHT_MODEL_TWO_SIDE, 1 ); // 面の表と裏に光があたるようにする //::glEnable( GL_COLOR_MATERIAL ); // 色設定をマテリアル設定として使用するようにする //::glColor3f( 0.5, 0.5, 0 ); glPolygonMode(GL_FRONT_AND_BACK, GL_FILL ); ::glBegin(GL_TRIANGLES); for( uiIndexGroup = 0; uiIndexGroup < m_model.vpGroup.size(); uiIndexGroup++ ) { CGroup* pGroup = m_model.vpGroup[uiIndexGroup]; ::glMaterialfv( GL_FRONT_AND_BACK, GL_AMBIENT, pGroup->material.f4Ambient ); ::glMaterialfv( GL_FRONT_AND_BACK, GL_DIFFUSE, pGroup->material.f4Diffuse ); ::glMaterialfv( GL_FRONT_AND_BACK, GL_SPECULAR, pGroup->material.f4Specular ); ::glMaterialf( GL_FRONT_AND_BACK, GL_SHININESS, pGroup->material.fShininess ); for( uiIndexTriangle = 0; uiIndexTriangle < pGroup->vuiIndexIndexedTriangle.size(); uiIndexTriangle++ ) { uiIndexIndexedTriangle = pGroup->vuiIndexIndexedTriangle[uiIndexTriangle]; uiIndexFacetNormal = m_model.vIndexedTriangle[uiIndexIndexedTriangle].uiIndexFacetNormal; ::glNormal3fv( (float*)&m_model.vVectorFacetNormal[uiIndexFacetNormal] ); uiIndexVertex0 = m_model.vIndexedTriangle[uiIndexIndexedTriangle].ui3IndexVertex[0]; uiIndexVertex1 = m_model.vIndexedTriangle[uiIndexIndexedTriangle].ui3IndexVertex[1]; uiIndexVertex2 = m_model.vIndexedTriangle[uiIndexIndexedTriangle].ui3IndexVertex[2]; ::glVertex3fv( (float*)&m_model.vVertex[uiIndexVertex0] ); ::glVertex3fv( (float*)&m_model.vVertex[uiIndexVertex1] ); ::glVertex3fv( (float*)&m_model.vVertex[uiIndexVertex2] ); } } ::glEnd(); ::glDisable( GL_LIGHTING ); ::glEndList(); } ::glCallList( m_uiDisplayListIndex_Face ); // ピック面 if( GL_FILL == m_auiName_pick[1] ) { uiIndexGroup = m_auiName_pick[2]; CGroup* pGroup = m_model.vpGroup[uiIndexGroup]; uiIndexTriangle = m_auiName_pick[3]; uiIndexIndexedTriangle = pGroup->vuiIndexIndexedTriangle[uiIndexTriangle]; ::glPushAttrib( GL_CURRENT_BIT ); ::glColor3f( 1.0, 1.0, 0.0 ); ::glBegin(GL_TRIANGLES); uiIndexVertex0 = m_model.vIndexedTriangle[uiIndexIndexedTriangle].ui3IndexVertex[0]; uiIndexVertex1 = m_model.vIndexedTriangle[uiIndexIndexedTriangle].ui3IndexVertex[1]; uiIndexVertex2 = m_model.vIndexedTriangle[uiIndexIndexedTriangle].ui3IndexVertex[2]; ::glVertex3fv( (float*)&m_model.vVertex[uiIndexVertex0] ); ::glVertex3fv( (float*)&m_model.vVertex[uiIndexVertex1] ); ::glVertex3fv( (float*)&m_model.vVertex[uiIndexVertex2] ); ::glEnd(); ::glPopAttrib(); } } else { // ピック描画 ::glPushName( GL_FILL ); glPolygonMode(GL_FRONT_AND_BACK, GL_FILL ); for( uiIndexGroup = 0; uiIndexGroup < m_model.vpGroup.size(); uiIndexGroup++ ) { ::glPushName( uiIndexGroup ); CGroup* pGroup = m_model.vpGroup[uiIndexGroup]; for( uiIndexTriangle = 0; uiIndexTriangle < pGroup->vuiIndexIndexedTriangle.size(); uiIndexTriangle++ ) { uiIndexIndexedTriangle = pGroup->vuiIndexIndexedTriangle[uiIndexTriangle]; ::glPushName( uiIndexTriangle ); ::glBegin(GL_TRIANGLES); uiIndexVertex0 = m_model.vIndexedTriangle[uiIndexIndexedTriangle].ui3IndexVertex[0]; uiIndexVertex1 = m_model.vIndexedTriangle[uiIndexIndexedTriangle].ui3IndexVertex[1]; uiIndexVertex2 = m_model.vIndexedTriangle[uiIndexIndexedTriangle].ui3IndexVertex[2]; ::glVertex3fv( (float*)&m_model.vVertex[uiIndexVertex0] ); ::glVertex3fv( (float*)&m_model.vVertex[uiIndexVertex1] ); ::glVertex3fv( (float*)&m_model.vVertex[uiIndexVertex2] ); ::glEnd(); ::glPopName(); // uiIndexTriangle } ::glPopName(); // uiIndexGroup } ::glPopName(); // GL_FILL } } if( m_bRenderLine && !(RM_PICK==eRenderMode && !m_bPickLine) ) { // 線 if( RM_RENDER == eRenderMode ) { // 通常描画 if( 0 == m_uiDisplayListIndex_Line ) { m_uiDisplayListIndex_Line = ::glGenLists( 1 ); ::glNewList( m_uiDisplayListIndex_Line, GL_COMPILE ); ::glLineWidth( 2.0 ); ::glColor3f( 0.0, 0.5, 0.5 ); glPolygonMode(GL_FRONT_AND_BACK, GL_LINE ); ::glBegin(GL_TRIANGLES); for( uiIndexGroup = 0; uiIndexGroup < m_model.vpGroup.size(); uiIndexGroup++ ) { CGroup* pGroup = m_model.vpGroup[uiIndexGroup]; for( uiIndexTriangle = 0; uiIndexTriangle < pGroup->vuiIndexIndexedTriangle.size(); uiIndexTriangle++ ) { uiIndexIndexedTriangle = pGroup->vuiIndexIndexedTriangle[uiIndexTriangle]; uiIndexVertex0 = m_model.vIndexedTriangle[uiIndexIndexedTriangle].ui3IndexVertex[0]; uiIndexVertex1 = m_model.vIndexedTriangle[uiIndexIndexedTriangle].ui3IndexVertex[1]; uiIndexVertex2 = m_model.vIndexedTriangle[uiIndexIndexedTriangle].ui3IndexVertex[2]; ::glVertex3fv( (float*)&m_model.vVertex[uiIndexVertex0] ); ::glVertex3fv( (float*)&m_model.vVertex[uiIndexVertex1] ); ::glVertex3fv( (float*)&m_model.vVertex[uiIndexVertex2] ); } } ::glEnd(); ::glEndList(); } ::glCallList( m_uiDisplayListIndex_Line ); // ピック線 if( GL_LINE == m_auiName_pick[1] ) { uiIndexGroup = m_auiName_pick[2]; CGroup* pGroup = m_model.vpGroup[uiIndexGroup]; uiIndexTriangle = m_auiName_pick[3]; uiIndexIndexedTriangle = pGroup->vuiIndexIndexedTriangle[uiIndexTriangle]; ui3 = m_auiName_pick[4]; ::glPushAttrib( GL_CURRENT_BIT | GL_LINE_BIT ); ::glLineWidth( 5.0 ); ::glColor3f( 0.0, 1.0, 1.0 ); ::glBegin(GL_LINES); uiIndexVertex0 = m_model.vIndexedTriangle[uiIndexIndexedTriangle].ui3IndexVertex[ui3]; uiIndexVertex1 = m_model.vIndexedTriangle[uiIndexIndexedTriangle].ui3IndexVertex[(ui3+1)%3]; ::glVertex3fv( (float*)&m_model.vVertex[uiIndexVertex0] ); ::glVertex3fv( (float*)&m_model.vVertex[uiIndexVertex1] ); ::glEnd(); ::glPopAttrib(); } } else { // ピック描画 ::glPushName( GL_LINE ); ::glLineWidth( 2.0 ); for( uiIndexGroup = 0; uiIndexGroup < m_model.vpGroup.size(); uiIndexGroup++ ) { ::glPushName( uiIndexGroup ); CGroup* pGroup = m_model.vpGroup[uiIndexGroup]; for( uiIndexTriangle = 0; uiIndexTriangle < pGroup->vuiIndexIndexedTriangle.size(); uiIndexTriangle++ ) { uiIndexIndexedTriangle = pGroup->vuiIndexIndexedTriangle[uiIndexTriangle]; ::glPushName( uiIndexTriangle ); for( ui3 = 0; ui3 < 3; ui3++ ) { ::glPushName( ui3 ); ::glBegin(GL_LINES); uiIndexVertex0 = m_model.vIndexedTriangle[uiIndexIndexedTriangle].ui3IndexVertex[ui3]; uiIndexVertex1 = m_model.vIndexedTriangle[uiIndexIndexedTriangle].ui3IndexVertex[(ui3+1)%3]; glVertex3fv( (float*)&m_model.vVertex[uiIndexVertex0] ); glVertex3fv( (float*)&m_model.vVertex[uiIndexVertex1] ); ::glEnd(); ::glPopName(); // ui3 } ::glPopName(); // uiIndexTriangle } ::glPopName(); // uiIndexGroup } ::glPopName(); // GL_LINE } } if( m_bRenderPoint && !(RM_PICK==eRenderMode && !m_bPickPoint) ) { // 点 if( RM_RENDER == eRenderMode ) { // 通常描画 if( 0 == m_uiDisplayListIndex_Point ) { m_uiDisplayListIndex_Point = ::glGenLists( 1 ); ::glNewList( m_uiDisplayListIndex_Point, GL_COMPILE ); ::glPointSize( 5.0 ); ::glColor3f( 0.5, 0.0, 0.5 ); glPolygonMode(GL_FRONT_AND_BACK, GL_POINT ); ::glBegin(GL_TRIANGLES); for( uiIndexGroup = 0; uiIndexGroup < m_model.vpGroup.size(); uiIndexGroup++ ) { CGroup* pGroup = m_model.vpGroup[uiIndexGroup]; for( uiIndexTriangle = 0; uiIndexTriangle < pGroup->vuiIndexIndexedTriangle.size(); uiIndexTriangle++ ) { uiIndexIndexedTriangle = pGroup->vuiIndexIndexedTriangle[uiIndexTriangle]; uiIndexVertex0 = m_model.vIndexedTriangle[uiIndexIndexedTriangle].ui3IndexVertex[0]; uiIndexVertex1 = m_model.vIndexedTriangle[uiIndexIndexedTriangle].ui3IndexVertex[1]; uiIndexVertex2 = m_model.vIndexedTriangle[uiIndexIndexedTriangle].ui3IndexVertex[2]; ::glVertex3fv( (float*)&m_model.vVertex[uiIndexVertex0] ); ::glVertex3fv( (float*)&m_model.vVertex[uiIndexVertex1] ); ::glVertex3fv( (float*)&m_model.vVertex[uiIndexVertex2] ); } } ::glEnd(); ::glEndList(); } ::glCallList( m_uiDisplayListIndex_Point ); // ピック点 if( GL_POINT == m_auiName_pick[1] ) { uiIndexGroup = m_auiName_pick[2]; CGroup* pGroup = m_model.vpGroup[uiIndexGroup]; uiIndexTriangle = m_auiName_pick[3]; uiIndexIndexedTriangle = pGroup->vuiIndexIndexedTriangle[uiIndexTriangle]; ui3 = m_auiName_pick[4]; ::glPushAttrib( GL_CURRENT_BIT | GL_POINT_BIT ); ::glPointSize( 10.0 ); ::glColor3f( 1.0, 0.0, 1.0 ); ::glBegin(GL_POINTS); uiIndexVertex0 = m_model.vIndexedTriangle[uiIndexIndexedTriangle].ui3IndexVertex[ui3]; ::glVertex3fv( (float*)&m_model.vVertex[uiIndexVertex0] ); ::glEnd(); ::glPopAttrib(); } } else { // ピック描画 ::glPushName( GL_POINT ); ::glPointSize( 5.0 ); for( uiIndexGroup = 0; uiIndexGroup < m_model.vpGroup.size(); uiIndexGroup++ ) { ::glPushName( uiIndexGroup ); CGroup* pGroup = m_model.vpGroup[uiIndexGroup]; for( uiIndexTriangle = 0; uiIndexTriangle < pGroup->vuiIndexIndexedTriangle.size(); uiIndexTriangle++ ) { uiIndexIndexedTriangle = pGroup->vuiIndexIndexedTriangle[uiIndexTriangle]; ::glPushName( uiIndexTriangle ); for( ui3 = 0; ui3 < 3; ui3++ ) { ::glPushName( ui3 ); ::glBegin(GL_POINTS); uiIndexVertex0 = m_model.vIndexedTriangle[uiIndexIndexedTriangle].ui3IndexVertex[ui3]; glVertex3fv( (float*)&m_model.vVertex[uiIndexVertex0] ); ::glEnd(); ::glPopName(); // ui3 } ::glPopName(); // uiIndexTriangle } ::glPopName(); // uiIndexGroup } ::glPopName(); // GL_POINT } } } ::glPopAttrib(); return; case RM_SELECT: { if( NULL == auiName ) { ASSERT( !"CPickOpenGLView::RenderObjects" ); return; } for( int iIndexName = 0; iIndexName < NAMEARRAYSIZE; iIndexName++ ) { m_auiName_pick[iIndexName] = auiName[iIndexName]; } switch( auiName[1] ) { // ピックオブジェクトに応じた処理 case GL_POINT: case GL_LINE: case GL_FILL: return; default: ASSERT( !"CPickOpenGLView::RenderObjects" ); return; } } return; default: ASSERT( !"CPickOpenGLView::RenderObjects" ); return; } }

ビルドし、エラー、警告がないことを確認します。

実行

実行し、動作を確認します。
（１１．で作成したモデルビューワと動作上の変化はありません。）

実行結果