public static void DrawGraphLines(Rect rect, Texture2D graphTexture, Func<float, float> Plot ) {
int graphX = (int)rect.x;
int graphY = (int)rect.y;
int graphWidth = (int)rect.width;
int graphHeight = (int)rect.height;
Color[] pixels = graphTexture.GetPixels(graphX, graphY, graphWidth, graphHeight);
Color32 color = new Color(0.2f, 0.2f, 0.2f);
for (int i = 0; i < pixels.Length; i++) {
pixels[i] = color;
}
graphTexture.SetPixels(graphX, graphY, graphWidth, graphHeight, pixels);
int lastX = graphX;
int lastY = graphHeight;
List<Vector2I> pointlist = new List<Vector2I>();
for (int i = 0; i < graphWidth; i++) {
float x = i / (float)graphWidth;
float y = Plot(x);
if (float.IsNaN(y)) continue; //not sure why this can happen but it does with non integer exponents
//inverted y because text rendindering is updside down and i cant figure out
//how to flip the text correctly, so im flipping the graph instead
pointlist.Add(new Vector2I(i, (int)((1 - y) * graphHeight)));
}
Color fadedGrey = new Color(0.24f, 0.24f, 0.24f, 0.5f);
int quarterWidth = (int)(graphWidth * 0.25f);
int quarterHeight = (int)(graphHeight * 0.25f);
graphTexture.DrawLine(graphX, graphY + graphHeight, graphX + graphWidth, graphY, fadedGrey);
graphTexture.DrawLine(graphX, quarterHeight * 1, graphX + graphWidth, quarterHeight * 1, fadedGrey);
graphTexture.DrawLine(graphX, quarterHeight * 2, graphX + graphWidth, quarterHeight * 2, fadedGrey);
graphTexture.DrawLine(graphX, quarterHeight * 3, graphX + graphWidth, quarterHeight * 3, fadedGrey);
graphTexture.DrawLine(quarterWidth * 1, graphY, quarterWidth * 1, graphY + graphHeight, fadedGrey);
graphTexture.DrawLine(quarterWidth * 2, graphY, quarterWidth * 2, graphY + graphHeight, fadedGrey);
graphTexture.DrawLine(quarterWidth * 3, graphY, quarterWidth * 3, graphY + graphHeight, fadedGrey);
if (pointlist.Count >= 2) {
lastX = pointlist[0].x;
lastY = pointlist[0].y;
for (int i = 1; i < pointlist.Count; i++) {
int y = pointlist[i].y;
graphTexture.DrawLine(lastX, lastY, i, y, Color.green);
lastX = i;
lastY = y;
}
}
}
void Start()
{
Material material = renderer.material;
Texture2D texture = new Texture2D(512,512, TextureFormat.RGB24, false);
texture.wrapMode = TextureWrapMode.Clamp;
material.SetTexture(0, texture);
texture.DrawFilledRectangle(new Rect(0, 0, 120, 120), Color.green);
texture.DrawRectangle(new Rect(0, 0, 120, 60), Color.red);
texture.DrawCircle(256, 256, 100, Color.cyan);
texture.DrawFilledCircle(256, 256, 50, Color.grey);
texture.DrawCircle(0, 0, 512, Color.red);
texture.DrawLine(new Vector2(120, 60), new Vector2(256, 256), Color.black);
texture.Apply();
}
private void DrawLine(Texture2D texture, float x0, float y0, float x1, float y1, Color color,int width =1)
{
for (int i = 0; i < width; i++)
{
float delta = 0.005f * i;
texture.DrawLine((int)((x0 + delta) * _textureScale), (int)((y0 + delta) * _textureScale), (int)((x1 + delta) * _textureScale),
(int)((y1 + delta) * _textureScale), color);
}
}
// Draw scanlines from opposite sides of the circle on y-scanlines instead of just plotting pixels
// at the right coordinates
private static void ScanLineCircle(Texture2D texture, int cx, int x, int cy, int y, Color color)
{
//texture.DrawPixel(cx + x, cy + y, color);
//texture.DrawPixel(-cx + x, cy + y, color);
texture.DrawLine(cx + x, cy + y, -cx + x, cy + y, color);
//texture.DrawPixel(cy + x, cx + y, color);
//texture.DrawPixel(-cy + x, cx + y, color);
texture.DrawLine(cy + x, cx + y, -cy + x, cx + y, color);
//texture.DrawPixel(-cx + x, -cy + y, color);
//texture.DrawPixel(cx + x, -cy + y, color);
texture.DrawLine(-cx + x, -cy + y, cx + x, -cy + y, color);
//texture.DrawPixel(-cy + x, -cx + y, color);
//texture.DrawPixel(cy + x, -cx + y, color);
texture.DrawLine(-cy + x, -cx + y, cy + x, -cx + y, color);
}
private void DrawLine(Texture2D texture, float x0, float y0, float x1, float y1, Color color)
{
texture.DrawLine((int)(x0 * _textureScale), (int)(y0 * _textureScale), (int)(x1 * _textureScale), (int)(y1 * _textureScale), color);
}
