/// <summary>
/// Create a <see cref="ArrayBufferBase"/> for testing.
/// </summary>
/// <returns>
/// It returns the <see cref="ArrayBufferBase"/> instance to test.
/// </returns>
private void CreateClientInstance(Buffer buffer)
{
if (buffer.GetType() == typeof(ArrayBuffer))
{
ArrayBuffer arrayBufferObject = (ArrayBuffer)buffer;
arrayBufferObject.Create(CreateTestArray());
}
else if (buffer.GetType() == typeof(ElementBuffer))
{
ElementBuffer elementBufferObject = (ElementBuffer)buffer;
elementBufferObject.Create(CreateTestArray());
}
}
public void ExampleSetVertexArraysIndexedElements(GraphicsContext ctx, ShaderProgram shaderProgram)
{
VertexArrays vao = new VertexArrays();
// ... create and setup buffers ...
ElementBuffer <int> indexBuffer = new ElementBuffer <int>(BufferUsage.StaticDraw);
indexBuffer.Create(new int[] { 0, 1, 2, 3, 2, 1 });
// Draw the first 6 deferenced vertices as GL_TRIANGLES
int idx1 = vao.SetElementArray(PrimitiveType.Triangles, indexBuffer);
// Draw the first two deferenced vertices as GL_LINES
int idx2 = vao.SetElementArray(PrimitiveType.Lines, indexBuffer, 0, 2);
// Create/update all resources linked to this instance
vao.Create(ctx);
// Draw all elements
vao.Draw(ctx, shaderProgram);
// Draw only the triangles
vao.Draw(ctx, shaderProgram, idx1);
}
