1 files changed, 63 insertions, 0 deletions
diff --git a/lib/TriangleMesh.h b/lib/TriangleMesh.h
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+++ b/lib/TriangleMesh.h
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+/*
+ *  TriangleMesh.h
+ *  OpenGL SuperBible
+ *
+ *  Copyright 2007 Richard S. Wright Jr.. All rights reserved.
+ *  This class allows you to simply add triangles as if this class were a 
+ *  container. The AddTriangle() function searches the current list of triangles
+ *  and determines if the vertex/normal/texcoord is a duplicate. If so, it addes
+ *  an entry to the index array instead of the list of vertices.
+ *  When finished, call EndMesh() to free up extra unneeded memory that is reserved
+ *  as workspace when you call BeginMesh().
+ *
+ *  This class can easily be extended to contain other vertex attributes, and to 
+ *  save itself and load itself from disk (thus forming the beginnings of a custom
+ *  model file format).
+ */
+ 
+#include "gltools.h"
+#include "math3d.h"
+
+class CTriangleMesh
+{
+    public:
+        CTriangleMesh(void);
+        ~CTriangleMesh(void);
+        
+        // Use these three functions to add triangles
+        void BeginMesh(GLuint nMaxVerts);
+        void AddTriangle(M3DVector3f verts[3], M3DVector3f vNorms[3], M3DVector2f vTexCoords[3]);
+        void EndMesh(void);
+
+        // Useful for statistics
+        inline GLuint GetIndexCount(void) { return nNumIndexes; }
+        inline GLuint GetVertexCount(void) { return nNumVerts; }
+        
+        // In place scale of the vertices
+        void Scale(GLfloat fScaleValue) {
+            for(int i = 0; i < nNumVerts; i++)
+                m3dScaleVector3(pVerts[i], fScaleValue);
+            }
+        
+        // Draw - make sure you call glEnableClientState for these arrays
+        void Draw(void) {
+                // Here's where the data is now
+            glVertexPointer(3, GL_FLOAT,0, pVerts);
+            glNormalPointer(GL_FLOAT, 0, pNorms);
+            glTexCoordPointer(2, GL_FLOAT, 0, pTexCoords);
+
+            // Draw them
+            glDrawElements(GL_TRIANGLES, nNumIndexes, GL_UNSIGNED_SHORT, pIndexes);
+        }
+        
+    protected:
+        GLushort  *pIndexes;          // Array of indexes
+        M3DVector3f *pVerts;        // Array of vertices
+        M3DVector3f *pNorms;        // Array of normals
+        M3DVector2f *pTexCoords;    // Array of texture coordinates
+        
+        GLuint nMaxIndexes;         // Maximum workspace
+        GLuint nNumIndexes;         // Number of indexes currently used
+        GLuint nNumVerts;           // 
+};
+