public VertexArray(Shader shader,
VertexList vertexes,
IList <uint> idxs = null,
PrimitiveType prim = PrimitiveType.Triangles,
BufferUsageHint usage = BufferUsageHint.StaticDraw)
{
Log.Assert(shader != null);
Log.Assert(vertexes != null);
//Vertexes = vertexes;
Layout = vertexes.Layout;
indices = idxs;
usageHint = usage;
primitive = prim;
NumberOfIndices = indices.Count;
vao = GL.GenVertexArray();
GL.BindVertexArray(vao);
buffer = GL.GenBuffer();
GL.BindBuffer(BufferTarget.ArrayBuffer, buffer);
indexBuffer = GL.GenBuffer();
GL.BindBuffer(BufferTarget.ElementArrayBuffer, indexBuffer);
AddVertexesToBuffer(vertexes);
AddIndicesToBuffer(indices);
SetupVertexPointers(shader, vertexes);
// Unbinding the buffer *does not* alter the state of the vertex array object.
// The association between buffer and vao is made on the GL.VertexAttribPointer() call.
GL.BindBuffer(BufferTarget.ArrayBuffer, 0);
// Except for ElementArrayBuffer's, OF COURSE.(?)
//GL.BindBuffer(BufferTarget.ElementArrayBuffer, 0);
GL.BindVertexArray(0);
}
public GlowFilter(int screenw, int screenh)
{
Log.Assert(Util.IsPowerOf2(screenw));
Log.Assert(Util.IsPowerOf2(screenh));
width = screenw;
height = screenh;
hGlowShader = Resources.TheResources.GetShader("glow1");
vGlowShader = Resources.TheResources.GetShader("glow2");
combineShader = Resources.TheResources.GetShader("glow3");
// XXX: This could be more efficient somehow...
matrix = Matrix4.CreateOrthographic(1, 1, 0, 10f);
// Create back-buffer
DestTexture1 = new Texture(width, height);
DestTexture2 = new Texture(width, height);
// Create framebuffer
fbo1 = new FramebufferObject(DestTexture1);
fbo2 = new FramebufferObject(DestTexture2);
//this.bb = Starmaze.Content.Images.Billboard();
// Make a billboard to render to.
// XXX: Aspect ratio...
var aspectRatio = 4.0f / 3.0f;
var bb = new VertexList(VertexLayout.TextureVertex);
var halfHeight = 1.0f / 2;
var halfWidth = 1.0f / 2;
bb.AddTextureVertex(
new Vector2(-halfWidth, -halfHeight),
Color4.White,
new Vector2(0, 0)
);
bb.AddTextureVertex(
new Vector2(-halfWidth, halfHeight),
Color4.White,
new Vector2(0, (1.0f / aspectRatio))
);
bb.AddTextureVertex(
new Vector2(halfWidth, halfHeight),
Color4.White,
new Vector2(1, (1.0f / aspectRatio))
);
bb.AddTextureVertex(
new Vector2(halfWidth, -halfHeight),
Color4.White,
new Vector2(1, 0)
);
var indices = new uint[] {
0, 1, 2,
0, 2, 3,
};
bb1 = new VertexArray(hGlowShader, bb, idxs: indices);
bb2 = new VertexArray(vGlowShader, bb, idxs: indices);
bb3 = new VertexArray(combineShader, bb, idxs: indices);
}
void AddVertexesToBuffer(VertexList verts)
{
Log.Assert(verts != null);
// Not the fastest way, but the easiest.
var vertexData = verts.ToArray();
GL.BufferData(BufferTarget.ArrayBuffer, (IntPtr)(verts.LengthInBytes),
vertexData, usageHint);
}
public PostprocStep(Shader shader, int screenw, int screenh)
{
Log.Assert(Util.IsPowerOf2(screenw));
Log.Assert(Util.IsPowerOf2(screenh));
width = screenw;
height = screenh;
this.shader = shader;
// XXX: This could be more efficient somehow...
matrix = Matrix4.CreateOrthographic(1, 1, 0, 10f);
// Create back-buffer
// XXX: Is ActiveTexture needed? I THINK so...
//GL.ActiveTexture(TextureUnit.Texture0);
DestTexture = new Texture(width, height);
// Create framebuffer
fbo = new FramebufferObject(DestTexture);
//this.bb = Starmaze.Content.Images.Billboard();
// Make a billboard to render to.
// XXX: Aspect ratio...
var aspectRatio = 4.0f / 3.0f;
var bb = new VertexList(VertexLayout.TextureVertex);
var halfHeight = 1.0f / 2;
var halfWidth = 1.0f / 2;
bb.AddTextureVertex(
new Vector2(-halfWidth, -halfHeight),
Color4.White,
new Vector2(0, 0)
);
bb.AddTextureVertex(
new Vector2(-halfWidth, halfHeight),
Color4.White,
new Vector2(0, (1.0f / aspectRatio))
);
bb.AddTextureVertex(
new Vector2(halfWidth, halfHeight),
Color4.White,
new Vector2(1, (1.0f / aspectRatio))
);
bb.AddTextureVertex(
new Vector2(halfWidth, -halfHeight),
Color4.White,
new Vector2(1, 0)
);
var indices = new uint[] {
0, 1, 2,
0, 2, 3,
};
this.bb = new VertexArray(shader, bb, idxs: indices);
}
/// <summary>
/// Returns a new vertex array containing the data in the VertexModel.
/// Makes some assumptions about what you're going to be drawing.
/// </summary>
/// <returns>The vertex array.</returns>
public VertexArray ToVertexArray(Shader s)
{
var verts = new VertexList(VertexLayout.ColorVertex);
for (int i = 0; i < positions.Count; i++)
{
verts.AddColorVertex(positions[i], colors[i]);
}
var vertArray = new VertexArray(s, verts, indices,
prim: PrimitiveType.Triangles, usage: BufferUsageHint.StaticDraw);
return(vertArray);
}
void SetupVertexPointers(Shader shader, VertexList vertexes)
{
Log.Assert(shader != null);
Log.Assert(vertexes != null);
var byteOffset = 0;
foreach (var vertexMember in Layout.Members)
{
var location = shader.VertexAttributeLocation(vertexMember.Name);
GL.EnableVertexAttribArray(location);
GL.VertexAttribPointer(location, vertexMember.Count, VertexAttribPointerType.Float,
false, Layout.ByteCount, byteOffset);
byteOffset += vertexMember.Count * VertexMember.ElementBytes;
}
}
