/// <summary>
/// Set the fog
/// </summary>
/// <param name="start"></param>
/// <param name="end"></param>
/// <param name="color"></param>
public static void SetFog(float start, float end, VulpineLib.Util.Color color)
{
var fog = new UniformBlockFog
{
Start = start,
End = end,
FogColor = color
};
unsafe
{
var ptr = (UniformBlockFog *)FogUniformBuffer.Map(BufferAccess.WriteOnly);
ptr[0] = fog;
FogUniformBuffer.Unmap();
}
}
/// <summary>
/// Draw a sprite
/// </summary>
/// <param name="sprite"></param>
/// <param name="transform"></param>
/// <param name="color"></param>
/// <param name="blendType"></param>
/// <exception cref="InvalidOperationException"></exception>
/// <exception cref="NullReferenceException"></exception>
public void DrawSprite(Sprite sprite, ref Matrix4 <float> transform, VulpineLib.Util.Color color, BlendType blendType)
{
Assert();
if (!Drawing)
{
throw new InvalidOperationException("Not drawing; Begin() must be called first");
}
var spriteSet = sprite.SpriteSet;
// If this Sprite's SpriteSet is not the same as the cached previous one, then
// update the cache to the new one and bind the new one's texture
if (spriteSet != LastSpriteSet)
{
if (spriteSet.Texture == null)
{
throw new NullReferenceException($"Sprite's SpriteSet ({sprite.SpriteSet.Name}) has a null Texture");
}
spriteSet.Texture.BindDiffuse();
LastSpriteSet = spriteSet;
}
// If this Sprite is not the same as the cached previous one, then
// update the cache to the new one and set the relevant shader uniforms
if (sprite != LastSprite !)
{
sprite.ShaderProgram.Bind();
sprite.ShaderProgram.SetTextureSource(sprite.TopLeftCoord, sprite.SizeCoord);
sprite.ShaderProgram.Uniform("uniform_origin", sprite.Origin);
LastSprite = sprite;
}
// Bind the BlendType
blendType.Bind();
// Set the model color
sprite.ShaderProgram.SetModelColor(color);
// Set the model matrix
sprite.ShaderProgram.SetModelMatrix(ref transform);
// Draw 4 vertices
GL.DrawArrays(PrimitiveType.TriangleStrip, 0, 4);
State.CheckError();
}
/// <summary>
/// Draw a mesh
/// </summary>
/// <param name="mesh"></param>
/// <param name="transform"></param>
/// <param name="color"></param>
/// <param name="blendType"></param>
public void DrawMesh(GPUMesh <T> mesh, ref Matrix4 <float> transform, VulpineLib.Util.Color color, BlendType blendType)
{
Assert();
if (!Drawing)
{
throw new InvalidOperationException("Not drawing; Begin() must be called first");
}
if (mesh != LastMesh !)
{
mesh.Bind();
LastMesh = mesh;
}
// Bind the BlendType
blendType.Bind();
// Set the model color
mesh.ShaderProgram.SetModelColor(color);
// Set the model matrix
mesh.ShaderProgram.SetModelMatrix(ref transform);
// Draw
mesh.Draw();
State.CheckError();
}
/// <summary>
/// Draw a sprite spanning a rectangle
/// </summary>
/// <param name="sprite"></param>
/// <param name="rectangle"></param>
/// <param name="color"></param>
/// <param name="blendType"></param>
/// <exception cref="InvalidOperationException"></exception>
/// <exception cref="NullReferenceException"></exception>
public void DrawSprite(Sprite sprite, VulpineLib.Geometry.Rectangle rectangle, VulpineLib.Util.Color color, BlendType blendType)
{
DrawSprite(
sprite,
new Vector3 <float>(
rectangle.Center,
0f
),
new Vector2 <float>(
rectangle.Width,
rectangle.Height
),
color,
blendType
);
}