SetOpacity()

static void SRL::VDP2::SpriteLayer::SetOpacity ( SRL::Math::Types::Fxp opacity, VDP2::SpriteBank bank = VDP2::SpriteBank::Bank0 )

inlinestatic

Set the opacities that sprites can select from in CC registers.

This Function takes the opacity specified as a fixed point value and converts it to one of the 32 color calculation ratios that the system can use (value is floored to the nearest ratio). It then sets the ratio in the specified sprite cc register (cc register 0 if not specified)

Note

Color ratios only apply to highest priority pixels in frame

When Color Calc is ON, max opacity is ~(0.97). Fully opaque sprites must select with color condition

When ColorCalcMode is set to UseColorAddition, The Opacity levels are ignored and Color addition is applied to all sprites whose priority meets the color condition (see SpriteLayer::SetColorCondition() for details)

RGB sprites always use the opacity set in CC register[bank0]

Does NOT turn color calc ON or OFF for the Sprite Layer(use SpriteLayer::ColorCalcON,OFF())

available cc registers vary by Palette code config- default allows all 8 banks

Parameters

opacity	Fxp decimal value between 0.0 and 1.0 representing pixel opacity of the cc register
bank	(optional) which of the 8 CC registers to Set the opacity in (defaults to 0)