public VAO CreateString(ShaderProgram Program, string Text)
{
Vector3[] vertices = new Vector3[Text.Length * 4];
Vector2[] uvs = new Vector2[Text.Length * 4];
int[] indices = new int[Text.Length * 6];
for (int i = 0; i < Text.Length; i++)
{
// Note: These are fixed width fonts so just use 2x2 quads (-1..1)
vertices[i * 4 + 0] = new Vector3(-1 + i * 2, 1, 0);
vertices[i * 4 + 1] = new Vector3(-1 + i * 2, -1, 0);
vertices[i * 4 + 2] = new Vector3(1 + i * 2, 1, 0);
vertices[i * 4 + 3] = new Vector3(1 + i * 2, -1, 0);
UVPair ch = Character[Text[i] > 256 ? ' ' : Text[i]];
uvs[i * 4 + 0] = new Vector2(ch.Topleft.x, ch.BottomRight.y);
uvs[i * 4 + 1] = ch.Topleft;
uvs[i * 4 + 2] = ch.BottomRight;
uvs[i * 4 + 3] = new Vector2(ch.BottomRight.x, ch.Topleft.y);
indices[i * 6 + 0] = i * 4 + 1;
indices[i * 6 + 1] = i * 4 + 0;
indices[i * 6 + 2] = i * 4 + 2;
indices[i * 6 + 3] = i * 4 + 1;
indices[i * 6 + 4] = i * 4 + 2;
indices[i * 6 + 5] = i * 4 + 3;
}
// Create the vertex buffer objects and then create the array object
VBO <Vector3> vertexArray = new VBO <Vector3>(vertices, BufferTarget.ArrayBuffer, BufferUsageHint.StaticRead);
VBO <Vector2> uvArray = new VBO <Vector2>(uvs, BufferTarget.ArrayBuffer, BufferUsageHint.StaticRead);
VBO <int> elementArray = new VBO <int>(indices, BufferTarget.ElementArrayBuffer, BufferUsageHint.StaticRead);
return(new VAO(Program, vertexArray, uvArray, elementArray));
}
/// <summary>
/// Binds a VBO to a shader attribute.
/// </summary>
/// <param name="buffer">The VBO to bind to the shader attribute.</param>
/// <param name="program">The shader program whose attribute will be bound to.</param>
/// <param name="attributeName">The name of the shader attribute to be bound to.</param>
public static void BindBufferToShaderAttribute <T>(VBO <T> buffer, ShaderProgram program, string attributeName)
where T : struct
{
uint location = (uint)Gl.GetAttribLocation(program.ProgramID, attributeName);
Gl.EnableVertexAttribArray(location);
Gl.BindBuffer(buffer);
Gl.VertexAttribPointer(location, buffer.Size, buffer.PointerType, true, Marshal.SizeOf(typeof(T)), IntPtr.Zero);
}
public VAO(ShaderProgram program, VBO <T1> vbo1, string attribName, VBO <int> elementArray)
: base(program)
{
GenericVAO.GenericVBO[] vbos = new GenericVBO[2];
vbos[0] = new GenericVBO(vbo1.vboID, attribName, vbo1.Count, vbo1.Size, vbo1.PointerType, vbo1.BufferTarget);
vbos[1] = new GenericVBO(elementArray.vboID, "", elementArray.Count, elementArray.Size, elementArray.PointerType, elementArray.BufferTarget);
Init(vbos);
}
public VAO(ShaderProgram program, VBO <T1> vbo1, string attribName, VBO <int> elementArray)
: base(program)
{
IGenericVBO[] vbos = new IGenericVBO[2];
vbos[0] = new GenericVBO <T1>(vbo1, attribName);
vbos[1] = new GenericVBO <int>(elementArray);
Init(vbos);
}
public VAO(ShaderProgram program, VBO <T1> vbo1, string[] attribNames, VBO <int> elementArray)
: base(program)
{
if (attribNames.Length != 1)
{
throw new Exception(string.Format("Expected an array of 1 name, but instead got {0}.", attribNames.Length));
}
GenericVAO.GenericVBO[] vbos = new GenericVBO[2];
vbos[0] = new GenericVBO(vbo1.vboID, attribNames[0], vbo1.Count, vbo1.Size, vbo1.PointerType, vbo1.BufferTarget);
vbos[1] = new GenericVBO(elementArray.vboID, "", elementArray.Count, elementArray.Size, elementArray.PointerType, elementArray.BufferTarget);
Init(vbos);
}
public VAO(ShaderProgram program, VBO <T1> vbo1, string[] attribNames, VBO <int> elementArray)
: base(program)
{
if (attribNames.Length != 1)
{
throw new Exception(string.Format("Expected an array of 1 name, but instead got {0}.", attribNames.Length));
}
IGenericVBO[] vbos = new IGenericVBO[2];
vbos[0] = new GenericVBO <T1>(vbo1, attribNames[0]);
vbos[1] = new GenericVBO <int>(elementArray);
Init(vbos);
}
/// <summary>
/// Deletes the vertex array from the GPU and will also dispose of any child VBOs if (DisposeChildren == true).
/// </summary>
public void Dispose()
{
// first try to dispose of the vertex array
if (vaoID != 0)
{
Gl.DeleteVertexArrays(1, new uint[] { vaoID });
vaoID = 0;
}
// children must be disposed of separately since OpenGL 2.1 will not have a vertex array
if (DisposeChildren)
{
if (vertex != null)
{
vertex.Dispose();
}
if (normal != null)
{
normal.Dispose();
}
if (tangent != null)
{
tangent.Dispose();
}
if (uv != null)
{
uv.Dispose();
}
if (element != null)
{
element.Dispose();
}
vertex = null;
normal = null;
tangent = null;
uv = null;
element = null;
}
}
/// <summary>
/// Binds a VBO based on the buffer target.
/// </summary>
/// <param name="buffer">The VBO to bind.</param>
public static void BindBuffer <T>(VBO <T> buffer)
where T : struct
{
Gl.BindBuffer(buffer.BufferTarget, buffer.vboID);
}
public VAO(ShaderProgram program, VBO <Vector3> vertex, VBO <Vector3> normal, VBO <Vector3> tangent, VBO <Vector2> uv, VBO <int> element)
{
this.Program = program;
this.VertexCount = element.Count;
this.DrawMode = BeginMode.Triangles;
this.vertex = vertex;
this.normal = normal;
this.tangent = tangent;
this.uv = uv;
this.element = element;
if (Gl.Version() >= 3)
{
vaoID = Gl.GenVertexArray();
if (vaoID != 0)
{
Gl.BindVertexArray(vaoID);
BindAttributes(this.Program);
}
Gl.BindVertexArray(0);
Draw = DrawOGL3;
}
else
{
Draw = DrawOGL2;
}
}
public VAO(ShaderProgram program, VBO <Vector3> vertex, VBO <Vector3> normal, VBO <Vector2> uv, VBO <int> element)
: this(program, vertex, normal, null, uv, element)
{
}
public GenericVBO(VBO <T> vbo, string name)
{
this.vbo = vbo;
this.name = name;
}
public GenericVBO(VBO <T> vbo) : this(vbo, string.Empty)
{
}
