From 163b963b1d6c1d0d288e27aeb978ff521a241917 Mon Sep 17 00:00:00 2001
From: Kyle K <kylek389@gmail.com>
Date: Sun, 3 Oct 2010 18:30:04 -0500
Subject: Initial commit
---
lib/TriangleMesh.h | 63 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 63 insertions(+)
create mode 100644 lib/TriangleMesh.h
(limited to 'lib/TriangleMesh.h')
diff --git a/lib/TriangleMesh.h b/lib/TriangleMesh.h
new file mode 100644
index 0000000..9fd97ed
--- /dev/null
+++ b/lib/TriangleMesh.h
@@ -0,0 +1,63 @@
+/*
+ * 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; //
+};
+
--
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