63 lines
2.9 KiB
C#
63 lines
2.9 KiB
C#
using System;
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using System.Numerics;
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using Raylib_cs;
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namespace PhysicsEngine
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{
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public static class DrawHelper
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{
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public static Color GetDarkerColor(Color color, float factor = 0.5f)
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{
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return new Color(
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(byte)(color.R * factor),
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(byte)(color.G * factor),
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(byte)(color.B * factor),
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color.A
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);
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}
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public static void DrawRotatedBox(Vector2 position, Vector2 size, float rotationRadians, Color fillColor, float pixelsPerMeter = 100.0f, float outlineThickness = 3.0f)
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{
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Vector2 sizePixels = size * pixelsPerMeter;
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Vector2 positionPixels = position * pixelsPerMeter;
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float rotationDegrees = rotationRadians * (180.0f / MathF.PI);
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Color outlineColor = GetDarkerColor(fillColor);
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// 1. Draw the outer outline rectangle (exact original size, outline colour)
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Vector2 outerSizePixels = sizePixels;
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Vector2 outerOrigin = outerSizePixels * 0.5f;
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Rectangle outerRec = new Rectangle(positionPixels.X, positionPixels.Y, outerSizePixels.X, outerSizePixels.Y);
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Raylib.DrawRectanglePro(outerRec, outerOrigin, rotationDegrees, outlineColor);
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// 2. Draw the inner fill rectangle, reduced by outlineThickness on all sides
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Vector2 innerSizePixels = new Vector2(
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MathF.Max(0, sizePixels.X - outlineThickness),
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MathF.Max(0, sizePixels.Y - outlineThickness)
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);
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Vector2 innerOrigin = innerSizePixels * 0.5f;
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Rectangle innerRec = new Rectangle(positionPixels.X, positionPixels.Y, innerSizePixels.X, innerSizePixels.Y);
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Raylib.DrawRectanglePro(innerRec, innerOrigin, rotationDegrees, fillColor);
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}
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public static void DrawCircleBody(Vector2 position, float radius, float rotationRadians, Color fillColor, float pixelsPerMeter = 100.0f, float outlineThickness = 3.0f)
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{
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Vector2 positionPixels = position * pixelsPerMeter;
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float radiusPixels = radius * pixelsPerMeter;
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Color outlineColor = GetDarkerColor(fillColor);
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// 1. Draw outer circle (outline colour, exact radius)
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Raylib.DrawCircleV(positionPixels, radiusPixels, outlineColor);
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// 2. Draw inner circle (fill colour, radius reduced by outlineThickness)
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float innerRadius = MathF.Max(0, radiusPixels - outlineThickness);
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Raylib.DrawCircleV(positionPixels, innerRadius, fillColor);
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// Draw rotation indicator line inside the fill (same as before, but from centre to inner edge)
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float cos = MathF.Cos(rotationRadians);
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float sin = MathF.Sin(rotationRadians);
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Vector2 edge = positionPixels + new Vector2(cos, sin) * innerRadius;
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Raylib.DrawLineEx(positionPixels, edge, 2.0f, outlineColor);
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}
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}
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} |