2D Shadow Effect

Description

This chapter briefly describes how to use the 2D shadow effect.

2D Configure a Shadow Effect 

Shadow Effect

By using Candera::ShadowBitmapBrushBlend, a colored shadow can be applied to a bitmap.

Following properties of the shadow can be configured:

Following is an example of a grey colored shadow, with a scale of 70% and an offset of 80/80 related to the bitmap:

Refer to SceneComposer User Manual about how to configure a ShadowBitmapBrushBlend effect in a 2D scene.

Modify 2D Shadow Effect Properties 

Access Shadow Effect

To modify the shadow effect properties, first the shadow effect needs to be retrieved from its render node:

    // Get and cast first effect of render node
    Effect2D* effect2D = renderNode->GetEffect(0);
    ShadowBitmapBrushBlend* shadow = 0;
    if (effect2D != 0){
        shadow = (ShadowBitmapBrushBlend*) effect2D;
    }
    // End Get and cast first effect of render node

Set Shadow Color

Specify a color with a red, a blue, a green and an alpha component and apply the color to the Shadow Effect.

Example:

Color::Data c;
c.alpha = 0.5f;
c.blue = 0.0f;
c.green = 0.0f;
c.red = 1.0f;
shadow->ShadowColor().Set(c);

Set Shadow Scale

For the shadow's scale you need the scale X and Y value. Add the two values to a Vector2 and set the shadow's scale.

Example:

Float shadowScaleX = 0.7f;
Float shadowScaleY = 0.7f;
shadow->ShadowScale().Set(Vector2(shadowScaleX, shadowScaleY));

Set Shadow Position Offset

It is possible to change the position of the shadow by changing its offset to the node. Therefore you need a Vector2 with the X and Y offset values again.

Example:

Float shadowPosOffX = 5.0f;
Float shadowPosOffY = 7.0f;
shadow->ShadowPositionOffset().Set(Vector2(shadowPosOffX, shadowPosOffY));