FlowShaders.kt

src/jvmMain/kotlin/afield/simulation/flow/FlowShaders.kt · 36 lines

Packaged GLSL helpers (grain.glsl, strokes.glsl, motion.glsl, tiles.glsl) for flow shaders, reachable as #include "flow/...".

The include resolver in shaders.kt already falls back to FlowShaders.source for flow/ paths, so a document needs no setup; FlowShaders.install registers the root explicitly, replacing any custom flow registration. Passes, resources and artistic controls stay in editable boxes.

package afield.simulation.flow

import afield.graphics.shader.ShaderIncludeResolution
import afield.graphics.shader.registerShaderIncludeRoot

object FlowShaders

Small shader functions; passes, resources and artistic controls remain editable boxes.

object FlowShaders {
    private val names = setOf("grain.glsl", "strokes.glsl", "motion.glsl", "tiles.glsl")

fun source(name: String): String

    fun source(name: String): String {
        require(name in names) { "Unknown flow shader helper: $name" }
        return checkNotNull(javaClass.getResourceAsStream("/afield/four/flow/$name")) {
            "Missing packaged flow shader: $name"
        }.bufferedReader().use { it.readText() }
    }

fun install()

Explicitly register the packaged root, replacing a custom "flow" registration. Ordinary includes already have a built-in fallback, so documents need no setup call.

    fun install() {
        registerShaderIncludeRoot("flow") { request ->
            if (request.includePath in names)
                ShaderIncludeResolution("flow/${request.includePath}", source(request.includePath))
            else null
        }
    }
}