/// <summary>
/// Draws a filled oval.
/// </summary>
/// <param name="centerX">The center X.</param>
/// <param name="centerY">The center Y.</param>
/// <param name="centerZ">The center Z.</param>
/// <param name="halfWidth">Half of the width.</param>
/// <param name="halfHeight">Half of the height.</param>
/// <param name="edges">The number of edges to draw the oval width.</param>
private void drawOvalFilled(float centerX, float centerY, float centerZ, float halfWidth, float halfHeight, int edges)
{
var vertices = new PrimitiveVertexData[edges];
Matrix2 rotation = Matrix2.CreateRotation(MathHelper.TwoPi / edges);
Vector2 xy = new Vector2(0, -1);
Color argb = this.Color;
vertices[0] = new PrimitiveVertexData(
centerX + xy.X * halfWidth, centerY + xy.Y * halfHeight, centerZ, argb);
for (int i = 1; i < edges; i++)
{
xy = rotation.Times(xy);
vertices[i] = new PrimitiveVertexData(
centerX + xy.X * halfWidth, centerY + xy.Y * halfHeight, centerZ, argb);
}
ushort offset = this.surface.AddVertices(vertices);
var ids = new ushort[(edges - 2) * 3];
for (int i = 0; i < edges - 2; i++)
{
int o = i * 3;
ids[o++] = offset;
ids[o++] = (ushort)(offset + i + 1);
ids[o] = (ushort)(offset + i + 2);
}
this.surface.AddIndices(ids);
}
/// <summary>
/// Draws an unfilled oval.
/// </summary>
/// <param name="centerX">The center X.</param>
/// <param name="centerY">The center Y.</param>
/// <param name="centerZ">The center Z.</param>
/// <param name="halfWidth">Half of the width.</param>
/// <param name="halfHeight">Half of the height.</param>
/// <param name="edges">The number of edges to draw the oval width.</param>
private void drawOvalUnfilled(float centerX, float centerY, float centerZ, float halfWidth, float halfHeight, int edges)
{
var vertices = new PrimitiveVertexData[edges * 2];
Matrix2 rotation = Matrix2.CreateRotation(MathHelper.TwoPi / edges);
Vector2 xy = new Vector2(0, -1);
Color argb = this.Color;
float innerW = halfWidth - this.LineWidth;
float innerH = halfHeight - this.LineWidth;
vertices[0] = new PrimitiveVertexData(
centerX + xy.X * halfWidth, centerY + xy.Y * halfHeight, centerZ, argb);
vertices[1] = new PrimitiveVertexData(
centerX + xy.X * innerW, centerY + xy.Y * innerH, centerZ, argb);
for (int i = 1; i < edges; i++)
{
xy = rotation.Times(xy);
vertices[2 * i] = new PrimitiveVertexData(
centerX + xy.X * halfWidth, centerY + xy.Y * halfHeight, centerZ, argb);
vertices[2 * i + 1] = new PrimitiveVertexData(
centerX + xy.X * innerW, centerY + xy.Y * innerH, centerZ, argb);
}
ushort offset = this.surface.AddVertices(vertices);
var ids = new ushort[edges * 6];
for (int i = 0; i < edges - 1; i++)
{
int j = i * 6;
int o = i * 2;
ids[j] = (ushort)(offset + o);
ids[j + 1] = (ushort)(offset + o + 2);
ids[j + 2] = (ushort)(offset + o + 1);
ids[j + 3] = (ushort)(offset + o + 1);
ids[j + 4] = (ushort)(offset + o + 2);
ids[j + 5] = (ushort)(offset + o + 3);
}
int lastJ = edges * 6 - 6;
ids[lastJ] = (ushort)(offset + edges * 2 - 2);
ids[lastJ + 1] = (ushort)(offset);
ids[lastJ + 2] = (ushort)(offset + edges * 2 - 1);
ids[lastJ + 3] = (ushort)(offset + edges * 2 - 1);
ids[lastJ + 4] = (ushort)(offset);
ids[lastJ + 5] = (ushort)(offset + 1);
this.surface.AddIndices(ids);
}
/// <summary>
/// Returns the vertex' <see cref="VertexAttributes" />
/// </summary>
/// <returns>
/// Array of <see cref="VertexAttribute" />
/// </returns>
public VertexAttribute[] VertexAttributes()
{
if (PrimitiveVertexData.vertexAttributes == null)
{
PrimitiveVertexData.setVertexAttributes();
}
return(PrimitiveVertexData.vertexAttributes);
}
/// <summary>
/// Draws a rectangle.
/// </summary>
/// <param name="x">The x coordinate of the rectangle's corner.</param>
/// <param name="y">The y coordinate of the rectangle's corner.</param>
/// <param name="z">The z coordinate of the rectangle's corner.</param>
/// <param name="w">The width of the rectangle.</param>
/// <param name="h">The height of the rectangle.</param>
public void DrawRectangle(float x, float y, float z, float w, float h, bool filled = true)
{
var v0 = new PrimitiveVertexData(x, y, z, Color);
var v1 = new PrimitiveVertexData(x + w, y, z, Color);
var v2 = new PrimitiveVertexData(x + w, y + h, z, Color);
var v3 = new PrimitiveVertexData(x, y + h, z, Color);
if (filled || LineWidth * 2 > w || LineWidth * 2 > h)
{
surface.AddQuad(v0, v1, v2, v3);
}
else
{
var v0i = new PrimitiveVertexData(x + LineWidth, y + LineWidth, z, Color);
var v1i = new PrimitiveVertexData(x + w - LineWidth, y + LineWidth, z, Color);
var v2i = new PrimitiveVertexData(x + w - LineWidth, y + h - LineWidth, z, Color);
var v3i = new PrimitiveVertexData(x + LineWidth, y + h - LineWidth, z, Color);
surface.AddQuad(v0, v1, v1i, v0i);
surface.AddQuad(v1, v2, v2i, v1i);
surface.AddQuad(v2, v3, v3i, v2i);
surface.AddQuad(v3, v0, v0i, v3i);
}
}
/// <summary>
/// Draws an unfilled oval.
/// </summary>
/// <param name="centerX">The center X.</param>
/// <param name="centerY">The center Y.</param>
/// <param name="centerZ">The center Z.</param>
/// <param name="halfWidth">Half of the width.</param>
/// <param name="halfHeight">Half of the height.</param>
/// <param name="edges">The number of edges to draw the oval width.</param>
private void drawOvalUnfilled(float centerX, float centerY, float centerZ, float halfWidth, float halfHeight, int edges)
{
var vertices = new PrimitiveVertexData[edges * 2];
Matrix2 rotation = Matrix2.CreateRotation(MathHelper.TwoPi / edges);
Vector2 xy = new Vector2(0, -1);
Color argb = this.Color;
float innerW = halfWidth - this.LineWidth;
float innerH = halfHeight - this.LineWidth;
vertices[0] = new PrimitiveVertexData(
centerX + xy.X * halfWidth, centerY + xy.Y * halfHeight, centerZ, argb);
vertices[1] = new PrimitiveVertexData(
centerX + xy.X * innerW, centerY + xy.Y * innerH, centerZ, argb);
for (int i = 1; i < edges; i++)
{
xy = rotation.Times(xy);
vertices[2 * i] = new PrimitiveVertexData(
centerX + xy.X * halfWidth, centerY + xy.Y * halfHeight, centerZ, argb);
vertices[2 * i + 1] = new PrimitiveVertexData(
centerX + xy.X * innerW, centerY + xy.Y * innerH, centerZ, argb);
}
ushort offset = this.surface.AddVertices(vertices);
var ids = new ushort[edges * 6];
for (int i = 0; i < edges - 1; i++)
{
int j = i * 6;
int o = i * 2;
ids[j] = (ushort)(offset + o);
ids[j + 1] = (ushort)(offset + o + 2);
ids[j + 2] = (ushort)(offset + o + 1);
ids[j + 3] = (ushort)(offset + o + 1);
ids[j + 4] = (ushort)(offset + o + 2);
ids[j + 5] = (ushort)(offset + o + 3);
}
int lastJ = edges * 6 - 6;
ids[lastJ] = (ushort)(offset + edges * 2 - 2);
ids[lastJ + 1] = (ushort)(offset);
ids[lastJ + 2] = (ushort)(offset + edges * 2 - 1);
ids[lastJ + 3] = (ushort)(offset + edges * 2 - 1);
ids[lastJ + 4] = (ushort)(offset);
ids[lastJ + 5] = (ushort)(offset + 1);
this.surface.AddIndices(ids);
}
/// <summary>
/// Draws a filled oval.
/// </summary>
/// <param name="centerX">The center X.</param>
/// <param name="centerY">The center Y.</param>
/// <param name="centerZ">The center Z.</param>
/// <param name="halfWidth">Half of the width.</param>
/// <param name="halfHeight">Half of the height.</param>
/// <param name="edges">The number of edges to draw the oval width.</param>
private void drawOvalFilled(float centerX, float centerY, float centerZ, float halfWidth, float halfHeight, int edges)
{
var vertices = new PrimitiveVertexData[edges];
Matrix2 rotation = Matrix2.CreateRotation(MathHelper.TwoPi / edges);
Vector2 xy = new Vector2(0, -1);
Color argb = this.Color;
vertices[0] = new PrimitiveVertexData(
centerX + xy.X * halfWidth, centerY + xy.Y * halfHeight, centerZ, argb);
for (int i = 1; i < edges; i++)
{
xy = rotation.Times(xy);
vertices[i] = new PrimitiveVertexData(
centerX + xy.X * halfWidth, centerY + xy.Y * halfHeight, centerZ, argb);
}
ushort offset = this.surface.AddVertices(vertices);
var ids = new ushort[(edges - 2) * 3];
for (int i = 0; i < edges - 2; i++)
{
int o = i * 3;
ids[o++] = offset;
ids[o++] = (ushort)(offset + i + 1);
ids[o] = (ushort)(offset + i + 2);
}
this.surface.AddIndices(ids);
}
