/// <summary>
/// Set an element to this mapped BufferObject.
/// </summary>
/// <param name="value">
/// A <see cref="Vertex2f"/> that specify the mapped BufferObject element.
/// </param>
/// <param name="offset">
/// A <see cref="UInt64"/> that specify the offset applied to the mapped BufferObject where <paramref name="value"/>
/// is stored. This value is expressed in basic machine units (bytes).
/// </param>
/// <exception cref="InvalidOperationException">
/// Exception thrown if this BufferObject is not mapped (<see cref="IsMapped"/>).
/// </exception>
public void Set(Vertex2f value, UInt64 offset)
{
if (IsMapped == false)
{
throw new InvalidOperationException("not mapped");
}
unsafe
{
byte * bufferPtr = (byte *)MappedBuffer.ToPointer();
Vertex2f *bufferItemPtr = (Vertex2f *)(bufferPtr + offset);
bufferItemPtr[0] = value;
}
}
private void DrawLines2f_GL_1_0(Vertex2f[] vertices)
{
if ((vertices.Length % 2) != 0)
{
throw new ArgumentException("length not a multiple of 2", "vertices");
}
Gl.Begin(PrimitiveType.Lines);
for (int i = 0; i < vertices.Length; i += 2)
{
Vertex2f v1 = vertices[i], v2 = vertices[i + 1];
Gl.Vertex2(v1.x, v1.y);
Gl.Vertex2(v2.x, v2.y);
}
Gl.End();
}
/// <summary>
/// Scale this ModelMatrix.
/// </summary>
/// <param name="s">
/// A <see cref="Vertex2f"/> holding the scaling factors on two dimensions.
/// </param>
public void SetScale(Vertex2f s)
{
SetScale(s.x, s.y, 1.0f);
}
/// <summary>
/// Construct a Matrix2x2f specifying the matrix columns.
/// </summary>
public Matrix2x2f(Vertex2f c0, Vertex2f c1)
{
Column0 = c0;
Column1 = c1;
}
/// <summary>
/// Construct a Matrix3x2f specifying the matrix columns.
/// </summary>
public Matrix3x2f(Vertex2f c0, Vertex2f c1, Vertex2f c2)
{
Column0 = c0;
Column1 = c1;
Column2 = c2;
}
/// <summary>
/// Set uniform state variable (variant type variable).
/// </summary>
/// <param name="ctx">
/// A <see cref="GraphicsContext"/> used for operations.
/// </param>
/// <param name="uniformName">
/// A <see cref="String"/> that specify the variable name in the shader source.
/// </param>
/// <param name="v">
/// A <see cref="Vertex2f"/> holding the uniform variabile data.
/// </param>
public void SetVariantUniform(GraphicsContext ctx, string uniformName, Vertex2f v)
{
SetVariantUniform(ctx, uniformName, v.x, v.y);
}