public void Draw(PrimitiveType mode)
{
lock (SyncRoot)
{
using (new GLEnableCap(EnableCap.Texture2D))
using (new GLEnableCap(EnableCap.Blend))
{
GL.BindBuffer(BufferTarget.ArrayBuffer, _vbo);
if (Indexed)
{
GL.BindBuffer(BufferTarget.ElementArrayBuffer, _ibo);
}
GL.EnableClientState(ArrayCap.VertexArray);
GL.EnableClientState(ArrayCap.ColorArray);
GL.EnableClientState(ArrayCap.TextureCoordArray);
GLEnableCap blend = null;
GL.BindTexture(TextureTarget.Texture2D, Texture);
if (Texture != 0)
{
GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureMagFilter, (int)TextureMagFilter.Linear);
GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureMinFilter, (int)TextureMinFilter.LinearMipmapLinear);
}
if (ChangedVerticies.Count != 0 && !_reloadVertices)
{
unsafe
{
foreach (var change in ChangedVerticies)
{
var vert = vertices[change];
GL.BufferSubData(BufferTarget.ArrayBuffer, new IntPtr(Vertex.Size * change),
new IntPtr(Vertex.Size), ref vert);
}
ChangedVerticies.Clear();
}
}
if (ChangedIndices.Count != 0 && !_reloadIndices)
{
unsafe
{
foreach (var change in ChangedIndices)
{
var ind = indices[change];
GL.BufferSubData(BufferTarget.ElementArrayBuffer, new IntPtr(sizeof(int) * change), new IntPtr(sizeof(int)), ref ind);
}
ChangedIndices.Clear();
}
}
if (_reloadVertices)
{
ChangedVerticies.Clear();
GL.BufferData(BufferTarget.ArrayBuffer, new IntPtr(vertices.Length * Vertex.Size), vertices, BufferUsageHint.DynamicDraw);
_reloadVertices = false;
}
if (_reloadIndices && Indexed)
{
ChangedIndices.Clear();
GL.BufferData(BufferTarget.ElementArrayBuffer, new IntPtr(indices.Length * sizeof(int)), indices, BufferUsageHint.StreamDraw);
_reloadIndices = false;
}
if (vCount != 0 && (!Indexed || iCount != 0))
{
GL.VertexPointer(2, VertexPointerType.Float, Vertex.Size, 0);
GL.ColorPointer(4, ColorPointerType.UnsignedByte, Vertex.Size, 8);
GL.TexCoordPointer(2, TexCoordPointerType.Float, Vertex.Size, 12);
if (Indexed)
{
GL.DrawElements(mode, iCount, DrawElementsType.UnsignedInt, 0);
}
else
{
GL.DrawArrays(mode, 0, vCount);
}
}
GL.BindTexture(TextureTarget.Texture2D, 0);
GL.BindBuffer(BufferTarget.ArrayBuffer, 0);
GL.BindBuffer(BufferTarget.ElementArrayBuffer, 0);
GL.DisableClientState(ArrayCap.TextureCoordArray);
GL.DisableClientState(ArrayCap.ColorArray);
GL.DisableClientState(ArrayCap.VertexArray);
if (blend != null)
{
blend.Dispose();
}
}
}
}
public static void DrawScarf(DynamicLine[] lines, float opacity)
{
GLEnableCap blend = null;
if (opacity < 1)
{
blend = new GLEnableCap(EnableCap.Blend);
GL.BlendFunc(BlendingFactorSrc.SrcAlpha, BlendingFactorDest.OneMinusSrcAlpha);
}
GameDrawingMatrix.Enter();
VAO scarf = new VAO(false, true);//VAO does not need disposing, it does not allocate a buffer
bool t = false;
for (int i = 0; i < lines.Length; i++)
{
Color c = Color.FromArgb((byte)(255 * opacity), 209, 1, 1);
var alt = Color.FromArgb((byte)(255 * opacity), 255, 100, 100);
var diff = lines[i].Position2 - lines[i].Position;
var dangle = MathHelper.RadiansToDegrees(Math.Atan2(diff.Y, diff.X)) + 90;
Vector2d q1;
Vector2d q2;
Vector2d q3;
Vector2d q4;
float size = 2;
if (i == 0)
{
var diff2 = lines[i + 1].Position2 - lines[i + 1].Position;
var dangle2 = MathHelper.RadiansToDegrees(Math.Atan2(diff2.Y, diff2.X)) + 90;
Turtle turtle = new Turtle(lines[i].Position);
turtle.Move(dangle2, -(size / 2));
q1 = turtle.Point;
turtle.Move(0, size);
q2 = turtle.Point;
turtle.Point = lines[i].Position2;
turtle.Move(dangle, size / 2);
q3 = turtle.Point;
turtle.Move(0, -size);
q4 = turtle.Point;
}
else
{
var diff2 = lines[i - 1].Position2 - lines[i - 1].Position;
var dangle2 = MathHelper.RadiansToDegrees(Math.Atan2(diff2.Y, diff2.X)) + 90;
Turtle turtle = new Turtle(lines[i].Position);
turtle.Move(dangle2, -(size / 2));
q1 = turtle.Point;
turtle.Move(0, size);
q2 = turtle.Point;
turtle.Point = lines[i].Position2;
turtle.Move(dangle, size / 2);
q3 = turtle.Point;
turtle.Move(0, -size);
q4 = turtle.Point;
}
scarf.AddVertex(new Vertex((Vector2)q1, t ? c : alt));
scarf.AddVertex(new Vertex((Vector2)q2, t ? c : alt));
scarf.AddVertex(new Vertex((Vector2)q3, t ? c : alt));
scarf.AddVertex(new Vertex((Vector2)q4, t ? c : alt));
t = !t;
}
scarf.Draw(PrimitiveType.Quads);
GameDrawingMatrix.Exit();
if (blend != null)
{
blend.Dispose();
}
}