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UnityBitmapDrawing

http://prototurtle.com

Bitmap Drawing API extension methods for Unity 3D's Texture2D class.

<b>What is it?</b>
By default, Texture2D only provides the methods SetPixel and GetPixel (and SetPixels and GetPixels). This library extends that functionality with useful basic drawing operations. It outputs pixel perfect and not anti-aliased bitmaps.

texture.DrawLine(new Vector2(0,0), new Vector2(100,200), Color.red);

<b>x = 0, y = 0 is the top left corner</b>
This library uses the convention of having the left top corner of the bitmap be the 0, 0 position. By default, Texture2D uses the bottom left corner convention which can be confusing for bitmap operations.

<b>Extension Methods</b>

C# Extension Methods work in a way that adds methods to a existing class. To start using this, you only need to include the namespace:

using ProtoTurtle.BitmapDrawing;

Your Texture2D instances will then have all the new methods available.

<b>Features</b>

• DrawPixel(position, color) - Draws a pixel but with the top left corner being position (x = 0, y = 0)
• DrawLine(start, end, color) - Draws a line between two points
• DrawCircle(position, radius, color) - Draws a circle
• DrawFilledCircle(position, radius, color) - Draws a circle filled with a color
• DrawRectangle(rectangle, color) - Draws a rectangle or a square
• DrawFilledRectangle(rectangle, color) - Draws a rectangle or a square filled with a color
• FloodFill(position, color) - Starts a flood fill of a certaing at the point

<b>Example</b>

using ProtoTurtle.BitmapDrawing;

// ...

Texture2D texture = new Texture2D(1024, 1024, TextureFormat.RGB24, false, true);
texture.filterMode = FilterMode.Point;
texture.wrapMode = TextureWrapMode.Clamp;
texture.DrawFilledRectangle(new Rect(0, 0, TEXTURE_SIZE, TEXTURE_SIZE), Color.grey);

texture.DrawCircle(100, 100, 20, Color.green);
texture.DrawCircle(80, 150, 5, Color.blue);
texture.DrawCircle(300, 300, 200, Color.black);
texture.FloodFill(100, 100, Color.green);
texture.FloodFill(300, 300, Color.white);
texture.DrawLine(new Vector2(10, 10), new Vector2(400, 200), Color.magenta);
texture.DrawLine(new Vector2(400, 200), new Vector2(100, 200), Color.magenta);
texture.Apply();

Output from this example (cropped the image to fit):

<b>Example project</b>
Here is a ready-to-go Unity project for easy testing.
https://github.com/ProtoTurtle/BitmapDrawingExampleProject