Wood pattern flow field(wip)

1 files changed, 22 insertions, 0 deletions

diff --git a/src/main/kotlin/phenax/utils/program.kt b/src/main/kotlin/phenax/utils/program.kt
index ced3e3a..fe48351 100644
--- a/src/main/kotlin/phenax/utils/program.kt
+++ b/src/main/kotlin/phenax/utils/program.kt
@@ -5,6 +5,7 @@ import kotlin.properties.ReadOnlyProperty
 import org.openrndr.ApplicationBuilder
 import org.openrndr.Program
 import org.openrndr.draw.*
+import org.openrndr.color.*
 import org.openrndr.extra.filewatcher.watchingFile
 import org.openrndr.extra.olive.oliveProgram as oliveProgramOriginal
 
@@ -57,6 +58,27 @@ fun preprocessShader(shaderCode: String): String {
 
 val defaultShaderCode: String = ""
 
+fun averageColor(cb: ColorBuffer): ColorRGBa {
+  val shadow = cb.shadow
+  shadow.download()
+
+  var r = 0.0
+  var g = 0.0
+  var b = 0.0
+  var a = 0.0
+  for (y in 0 until cb.height) {
+    for (x in 0 until cb.width) {
+      val c = shadow[x, y]
+      r += c.r
+      g += c.g
+      b += c.b
+      a += c.alpha
+    }
+  }
+  val n = (cb.width * cb.height).toDouble()
+  return ColorRGBa(r / n, g / n, b / n, a / n)
+}
+
 fun Program.liveComputeShader(name: String): ReadOnlyProperty<Any?, ComputeShader> {
   val shaderCode by
           watchingFile(File("src/main/resources/shaders/${name}.glsl")) { file ->