RB.ShaderSet

Method - Static

public static void ShaderSet(ShaderAsset shader)

Parameters

shader

ShaderAsset

Shader asset

Returns

Nothing.

Description

Set the current shader previously loaded by ShaderAsset.Load. This shader will remain in effect until next call to ShaderSet, RB.ShaderReset, or when the current rendering frame ends.

Example

SpriteSheetAsset spriteTiles = new SpriteSheetAsset();
SpriteSheetAsset offscreenRaw = new SpriteSheetAsset();
SpriteSheetAsset offscreenRippleMask = new SpriteSheetAsset();

ShaderAsset shaderRipple = new ShaderAsset();

const int LAYER_TERRAIN = 0;
const int LAYER_WATER = 1;

void Initialize() {
    spriteTiles.Load("spritesheet/tiles", new Vector2i(16, 16));
    offscreenRaw.Load(RB.DisplaySize);
    offscreenRippleMask.Load(RB.DisplaySize);

    TMXMapAsset map = new TMXMapAsset();
    map.Load("map/level1");
    map.LoadLayer(map, "terrain", LAYER_TERRAIN);
    map.LoadLayer(map, "water", LAYER_WATER);
    RB.MapLayerSpriteSheetSet(LAYER_TERRAIN, spriteTiles);
    RB.MapLayerSpriteSheetSet(LAYER_WATER, spriteTiles);

    shaderRipple.Load("shaders/ripple");
}

void Render() {
    RB.SpriteSheetSet(spriteTiles);

    // First draw the terrain tiles
    RB.Offscreen(offscreenRaw);
    RB.DrawMapLayer(LAYER_TERRAIN);

    // Now draw the ripple "mask" layer
    RB.Offscreen(offscreenRippleMask);
    RB.DrawMapLayer(LAYER_WATER);

    // Combine the layers to create a rippling water effect
    // First, set the source spritesheet DrawCopy will copy from
    RB.SpriteSheetSet(offscreenRaw);

    // Activate the shader
    RB.ShaderSet(shaderRipple);

    // Set shader properties, including an animating "wave" float value,
    // and the source mask texture which will be used to animate pixels that
    // are "under water"
    shaderRipple.FloatSet("wave", RB.Ticks / 25.0f);
    shaderRipple.SpriteSheetTextureSet("mask_tex", OFFSCREEN_RIPPLE_MASK);

    // Draw with the shader enabled
    RB.Onscreen();
    RB.DrawCopy(new Rect2i(0, 0, RB.DisplaySize.width, RB.DisplaySize.height), Vector2i.zero);

    // Turn off custom shader
    RB.ShaderReset();
}

See Docs