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Tried to implement some things, but it's broken.

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This commit is contained in:
the_fiddler 2007-11-06 21:01:35 +00:00
parent 0e0ff6e735
commit 37f94717de
1 changed files with 73 additions and 39 deletions
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112
Source/Examples/Tutorial/T08_VBO.cs
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@ -15,6 +15,8 @@ using OpenTK.OpenGL;
using OpenTK.Platform;
using System.Threading;
using OpenTK.OpenGL.Enums;
using System.Runtime.InteropServices;
using OpenTK.Math;
#endregion
@ -24,12 +26,18 @@ namespace Examples.Tutorial
{
#region --- Private Fields ---
Shapes.Shape shape = new Examples.Shapes.Cube();
//new Examples.Shapes.Plane(16, 16, 2.0f, 2.0f);
int handle_vertex_buffer, ibo, nbo; // vertex, index and normal buffer objects.
Shapes.Shape cube = new Examples.Shapes.Cube();
Shapes.Shape plane = new Examples.Shapes.Plane(16, 16, 2.0f, 2.0f);
struct Vbo
{
public int VboID, EboID, NumElements;
}
Vbo[] vbo = new Vbo[2];
float angle;
public static readonly int order = 8;
#endregion
#region --- Constructor ---
@ -44,44 +52,23 @@ namespace Examples.Tutorial
{
base.OnLoad(e);
if (!GL.SupportsExtension("VERSION_1_4"))
if (!GL.SupportsExtension("VERSION_1_5"))
{
System.Windows.Forms.MessageBox.Show("You need at least OpenGL 1.4 to run this example. Aborting.", "VBOs not supported",
System.Windows.Forms.MessageBox.Show("You need at least OpenGL 1.5 to run this example. Aborting.", "VBOs not supported",
System.Windows.Forms.MessageBoxButtons.OK, System.Windows.Forms.MessageBoxIcon.Exclamation);
this.Exit();
}
GL.ClearColor(0.1f, 0.1f, 0.5f, 0.0f);
GL.Enable(EnableCap.DepthTest);
GL.EnableClientState(EnableCap.VertexArray);
//GL.EnableClientState(GL.Enums.EnableCap.INDEX_ARRAY);
// Create the Vertex Buffer Object:
// 1) Generate the buffer handles.
// 2) Bind the Vertex Buffer and upload your vertex data. Check that the data was uploaded correctly.
// 3) Bind the Index Buffer and upload your index data. Check that the data was uploaded correctly.
int size; // To check whether the buffers were uploaded correctly.
// Generate handles.
GL.GenBuffers(1, out handle_vertex_buffer);
//GL.GenBuffers(1, out ibo);
// Upload the vertex data.
GL.BindBuffer(Version15.ArrayBuffer, handle_vertex_buffer);
GL.BufferData(Version15.ArrayBuffer, (IntPtr)shape.Vertices.Length, shape.Vertices, Version15.StaticDraw);
GL.VertexPointer(3, VertexPointerType.Float, 0, IntPtr.Zero);
GL.GetBufferParameter(Version15.ArrayBuffer, Version15.BufferSize, out size);
if (shape.Vertices.Length != size)
throw new ApplicationException("Vertex array not uploaded correctly");
/*
// Upload the index data.
GL.BindBuffer(GL.Enums.VERSION_1_5.ELEMENT_ARRAY_BUFFER, ibo);
GL.BufferData(GL.Enums.VERSION_1_5.ELEMENT_ARRAY_BUFFER, (IntPtr)shape.Indices.Length, shape.Indices, GL.Enums.VERSION_1_5.STATIC_DRAW);
GL.GetBufferParameter(GL.Enums.VERSION_1_5.ELEMENT_ARRAY_BUFFER, GL.Enums.VERSION_1_5.BUFFER_SIZE, out size);
if (shape.Indices.Length != size)
throw new ApplicationException("Index array not uploaded correctly");
*/
vbo[0] = Load(cube.Vertices, cube.Indices);
vbo[1] = Load(cube.Vertices, cube.Indices);
}
#endregion
@ -128,17 +115,14 @@ namespace Examples.Tutorial
GL.MatrixMode(MatrixMode.Modelview);
GL.LoadIdentity();
Glu.LookAt(
0.0, 5.0, 5.0,
0.0, 0.0, 0.0,
0.0, 1.0, 0.0
);
Glu.LookAt(0.0, 5.0, 5.0,
0.0, 0.0, 0.0,
0.0, 1.0, 0.0);
GL.Color3(1.0f, 1.0f, 1.0f);
GL.DrawElements(BeginMode.Triangles, shape.Indices.Length,
All.UnsignedInt, shape.Indices);
GL.Color4(System.Drawing.Color.Black);
Draw(vbo[0]);
Context.SwapBuffers();
SwapBuffers();
}
#endregion
@ -158,6 +142,56 @@ namespace Examples.Tutorial
#endregion
public static readonly int order = 8;
Vbo Load(Vector3[] vertices, int[] indices)
{
Vbo handle = new Vbo();
int size;
GL.GenBuffers(1, out handle.VboID);
GL.BindBuffer(Version15.ArrayBuffer, handle.VboID);
GL.BufferData(Version15.ArrayBuffer, (IntPtr)(vertices.Length * Vector3.SizeInBytes), vertices,
Version15.StaticDraw);
GL.GetBufferParameter(Version15.ArrayBuffer, Version15.BufferSize, out size);
if (vertices.Length * Vector3.SizeInBytes != size)
throw new ApplicationException("Vertex array not uploaded correctly");
//GL.BindBuffer(Version15.ArrayBuffer, 0);
GL.GenBuffers(1, out handle.EboID);
GL.BindBuffer(Version15.ElementArrayBuffer, handle.EboID);
GL.BufferData(Version15.ElementArrayBuffer, (IntPtr)(indices.Length * sizeof(int)), indices,
Version15.StaticDraw);
GL.GetBufferParameter(Version15.ElementArrayBuffer, Version15.BufferSize, out size);
if (indices.Length * sizeof(int) != size)
throw new ApplicationException("Element array not uploaded correctly");
//GL.BindBuffer(Version15.ElementArrayBuffer, 0);
handle.NumElements = indices.Length;
return handle;
}
void Draw(Vbo handle)
{
//GL.PushClientAttrib(ClientAttribMask.ClientVertexArrayBit);
//GL.EnableClientState(EnableCap.TextureCoordArray);
GL.EnableClientState(EnableCap.VertexArray);
GL.BindBuffer(Version15.StaticDraw, handle.VboID);
GL.BindBuffer(Version15.ElementArrayBuffer, handle.EboID);
//GL.TexCoordPointer(2, TexCoordPointerType.Float, vector2_size, (IntPtr)vector2_size);
GL.VertexPointer(3, VertexPointerType.Float, Vector3.SizeInBytes, IntPtr.Zero);
GL.DrawElements(BeginMode.Triangles, handle.NumElements, All.UnsignedInt, IntPtr.Zero);
//GL.DrawArrays(BeginMode.LineLoop, 0, vbo.element_count);
GL.BindBuffer(Version15.ArrayBuffer, 0);
GL.BindBuffer(Version15.ElementArrayBuffer, 0);
GL.DisableClientState(EnableCap.VertexArray);
//GL.DisableClientState(EnableCap.TextureCoordArray);
//GL.PopClientAttrib();
}
}
}