[orx-expression-evaluator] Switch to antlr-kotlin for parser generation and make it a common kotlin module

2024-01-05 12:40:59 +01:00
parent a407824bae
commit 456596aba7
21 changed files with 101 additions and 63 deletions
--- a/orx-expression-evaluator/src/jvmDemo/kotlin/DemoExpressionEvaluator01.kt
+++ b/orx-expression-evaluator/src/jvmDemo/kotlin/DemoExpressionEvaluator01.kt
@@ -0,0 +1,46 @@
+import org.openrndr.application
+import org.openrndr.extra.expressions.evaluateExpression
+import org.openrndr.extra.gui.GUI
+import org.openrndr.extra.gui.addTo
+import org.openrndr.extra.parameters.TextParameter
+
+fun main() {
+    application {
+        program {
+            val gui = GUI()
+            gui.compartmentsCollapsedByDefault = false
+
+            val settings = object {
+                @TextParameter("x expression", order = 10)
+                var xExpression = "cos(t) * 50.0 + width / 2.0"
+
+                @TextParameter("y expression", order = 20)
+                var yExpression = "sin(t) * 50.0 + height / 2.0"
+
+                @TextParameter("radius expression", order = 30)
+                var radiusExpression = "cos(t) * 50.0 + 50.0"
+            }.addTo(gui)
+
+            extend(gui)
+            extend {
+                //gui.visible = mouse.position.x < 200.0
+
+                val expressionContext =
+                    mapOf("t" to seconds, "width" to drawer.bounds.width, "height" to drawer.bounds.height)
+
+                fun eval(expression: String): Double =
+                    try {
+                        evaluateExpression(expression, expressionContext) ?: 0.0
+                    } catch (e: Throwable) {
+                        0.0
+                    }
+
+                val x = eval(settings.xExpression)
+                val y = eval(settings.yExpression)
+                val radius = eval(settings.radiusExpression)
+
+                drawer.circle(x, y, radius)
+            }
+        }
+    }
+}