GDI+

Waves

• Demonstration
• Functionality:
  • new wave is created with double-click
  • wave properties
    • color: Blue
    • radius: from 0 to 256 pixels
    • transparency: from 0% to 100% (linear variation along the radius)
    • wave front width: from 0.2 to 0.0 of maximal radius (linear variation along the radius)
    • velocity: ~64 pixels / sec.
  • wave front properties
    • 
    • R - radius
    • r = 0.1 * (256 - R)
    • transparency in B point = R / 256 * 100%
    • transparency in points A and C = 0%
    • linear gradient from A to B and from B to C
  • unlimited waves number
  • flicker-free, optimized (fast) rendering - extreme inefficient implementations will be penalized
• Hints:
  • PathGradientBrush, PathGradientBrush.CenterPoint, PathGradientBrush.InterpolationColors
  • ColorBlend, ColorBlend.Colors, ColorBlend.Positions
  • GraphicsPath
  • Color.FromArgb(), Color.Transparent
  • List<T>

• Approximate points:
  • wave animation [2.5]
  • wave front mid-point transparency change [1.5]
  • transparency change inside the wave front [2.0]
  • wave front width change [1.5]
  • unlimited waves number [1.5]
  • rendering speed and quality [1.0]

• Links for uploading:
  • Solutions
  • Corrections