/// <summary>
/// Initializes a new instance of the <see cref="Color4"/> class using values from another instance.
/// </summary>
/// <param name="color">A <see cref="Color4"/> instance.</param>
public Color4(Color4 color)
{
_red = color.R;
_green = color.G;
_blue = color.B;
_alpha = color.A;
}
public Renderer()
{
loadedTextures = new Dictionary<string, int>();
ClearColor = new Color4(1.0f, 1.0f, 1.0f, 1.0f);
}
protected void SetColor(Color4 color)
{
GL.Color4(color.R, color.G, color.B, color.A);
}
// TODO: scale this correctly
public void DrawVector2(Vector2 tail, Vector2 head, Color4 color)
{
Vector2 v = head - tail;
v *= 2.0f;
head = v + tail;
Rotation2 rotation1 = new Rotation2(0.4f);
Rotation2 rotation2 = new Rotation2(-0.4f);
Vector2 dir1, dir2;
dir1 = rotation1 * (tail - head) * 0.1f;
dir2 = rotation2 * (tail - head) * 0.1f;
SetColor(color);
GL.Begin(PrimitiveType.Lines);
GL.Vertex2(tail.X, tail.Y);
GL.Vertex2(head.X, head.Y);
GL.Vertex2(head.X, head.Y);
GL.Vertex2(head.X + dir1.X, head.Y + dir1.Y);
GL.Vertex2(head.X, head.Y);
GL.Vertex2(head.X + dir2.X, head.Y + dir2.Y);
GL.End();
}
public void DrawLine(Vector2 A, Vector2 B, Color4 color)
{
SetColor(color);
GL.Begin(PrimitiveType.Lines);
GL.Vertex2(A.X, A.Y);
GL.Vertex2(B.X, B.Y);
GL.End();
}
public void DrawCylinder(Vector2 A, Vector2 B, float radius, Color4 fillColor, Color4 outlineColor)
{
Vector2 AB = B - A;
float ang0 = (float)System.Math.Atan2(AB.Y, AB.X) + (float)MathFunctions.PI / 2.0f;
const float N = 8;
if (fillColor.A > 0.0f)
{
SetColor(fillColor);
GL.Begin(PrimitiveType.TriangleFan);
for (int n = 0; n <= N; n++)
{
float f = ang0 + ((float)n / (float)N) * (float)MathFunctions.PI;
Vector2 v = A + radius * new Vector2((float)MathFunctions.Cos(f), (float)MathFunctions.Sin(f));
GL.Vertex2(v.X, v.Y);
}
for (int n = 0; n <= N; n++)
{
float f = ang0 + (float)MathFunctions.PI + ((float)n / (float)N) * (float)MathFunctions.PI;
Vector2 v = B + radius * new Vector2((float)MathFunctions.Cos(f), (float)MathFunctions.Sin(f));
GL.Vertex2(v.X, v.Y);
}
GL.End();
}
if (outlineColor.A > 0.0f)
{
SetColor(outlineColor);
GL.Begin(PrimitiveType.LineLoop);
for (int n = 0; n <= N; n++)
{
float f = ang0 + ((float)n / (float)N) * (float)MathFunctions.PI;
Vector2 v = A + radius * new Vector2((float)MathFunctions.Cos(f), (float)MathFunctions.Sin(f));
GL.Vertex2(v.X, v.Y);
}
for (int n = 0; n <= N; n++)
{
float f = ang0 + (float)MathFunctions.PI + ((float)n / (float)N) * (float)MathFunctions.PI;
Vector2 v = B + radius * new Vector2((float)MathFunctions.Cos(f), (float)MathFunctions.Sin(f));
GL.Vertex2(v.X, v.Y);
}
GL.End();
}
}
public void DrawCircle(Vector2 center, float radius, Color4 fillColor, Color4 outlineColor)
{
const int numCircleVerts = 16;
if (fillColor.A > 0.0f)
{
SetColor(fillColor);
GL.Begin(PrimitiveType.TriangleFan);
for (int i = 0; i < numCircleVerts; i++)
{
Vector2 v = center + radius * new Vector2((float)MathFunctions.Cos(2.0f * MathFunctions.PI * (float)i / (float)numCircleVerts), (float)MathFunctions.Sin(2.0f * MathFunctions.PI * (float)i / (float)numCircleVerts));
GL.Vertex2(v.X, v.Y);
}
GL.End();
}
if (outlineColor.A > 0.0f)
{
SetColor(outlineColor);
GL.Begin(PrimitiveType.LineLoop);
for (int i = 0; i < numCircleVerts; i++)
{
Vector2 v = center + radius * new Vector2((float)MathFunctions.Cos(2.0f * MathFunctions.PI * (float)i / (float)numCircleVerts), (float)MathFunctions.Sin(2.0f * MathFunctions.PI * (float)i / (float)numCircleVerts));
GL.Vertex2(v.X, v.Y);
}
GL.End();
}
}
public void DrawBox(Box2 box, Color4 fillColor, Color4 outlineColor)
{
if (fillColor.A > 0.0f)
{
SetColor(fillColor);
GL.Begin(PrimitiveType.Quads);
GL.Vertex2(box.Left, box.Bottom);
GL.Vertex2(box.Right, box.Bottom);
GL.Vertex2(box.Right, box.Top);
GL.Vertex2(box.Left, box.Top);
GL.End();
}
if (outlineColor.A > 0.0f)
{
SetColor(outlineColor);
GL.Begin(PrimitiveType.LineLoop);
GL.Vertex2(box.Left, box.Bottom);
GL.Vertex2(box.Right, box.Bottom);
GL.Vertex2(box.Right, box.Top);
GL.Vertex2(box.Left, box.Top);
GL.End();
}
}
/// <summary>
/// Initializes a new instance of the <see cref="Color4"/> class from a blend of two colors.
/// </summary>
/// <param name="source">The blend source color.</param>
/// <param name="dest">The blend destination color.</param>
/// <param name="opacity">The opacity value.</param>
public Color4(Color4 source, Color4 dest, float opacity)
{
_red = MathFunctions.LinearInterpolation(source.R, dest.R, opacity);
_green = MathFunctions.LinearInterpolation(source.G, dest.G, opacity);
_blue = MathFunctions.LinearInterpolation(source.B, dest.B, opacity);
}
public void DrawTexturedQuad(int TextureID, Box2 Box, Color4 color, bool flipX)
{
SetColor(color);
GL.Enable(EnableCap.Texture2D);
GL.Enable(EnableCap.Blend);
GL.BlendFunc(BlendingFactorSrc.SrcAlpha, BlendingFactorDest.OneMinusSrcAlpha);
GL.BindTexture(TextureTarget.Texture2D, TextureID);
GL.Begin(PrimitiveType.Quads);
if (!flipX)
{
GL.TexCoord2(0.0f, 1.0f); GL.Vertex2(Box.Left, Box.Bottom);
GL.TexCoord2(1.0f, 1.0f); GL.Vertex2(Box.Right, Box.Bottom);
GL.TexCoord2(1.0f, 0.0f); GL.Vertex2(Box.Right, Box.Top);
GL.TexCoord2(0.0f, 0.0f); GL.Vertex2(Box.Left, Box.Top);
}
else
{
GL.TexCoord2(1.0f, 1.0f); GL.Vertex2(Box.Left, Box.Bottom);
GL.TexCoord2(0.0f, 1.0f); GL.Vertex2(Box.Right, Box.Bottom);
GL.TexCoord2(0.0f, 0.0f); GL.Vertex2(Box.Right, Box.Top);
GL.TexCoord2(1.0f, 0.0f); GL.Vertex2(Box.Left, Box.Top);
}
GL.End();
GL.BindTexture(TextureTarget.Texture2D, 0);
}
