[orx-mesh, orx-mesh-generator, orx-obj-loader] Add decal and tangent tools

2024-09-25 09:51:46 +02:00
parent fb3bb6f7a6
commit e016891b1d
28 changed files with 1072 additions and 82 deletions
--- a/orx-mesh-generators/src/jvmDemo/kotlin/decal/DemoDecal01.kt
+++ b/orx-mesh-generators/src/jvmDemo/kotlin/decal/DemoDecal01.kt
@@ -0,0 +1,55 @@
+package decal
+
+import org.openrndr.application
+import org.openrndr.draw.DrawPrimitive
+import org.openrndr.draw.shadeStyle
+import org.openrndr.extra.camera.Orbital
+import org.openrndr.extra.mesh.*
+import org.openrndr.extra.objloader.loadOBJMeshData
+import org.openrndr.extra.meshgenerators.decal.decal
+import org.openrndr.math.Vector3
+import org.openrndr.math.transforms.buildTransform
+import java.io.File
+
+/**
+ * Demonstrate decal generator as an object slicer
+ */
+fun main() {
+    application {
+        configure {
+            width = 720
+            height = 720
+        }
+        program {
+            val obj = loadOBJMeshData(File("demo-data/obj-models/suzanne/Suzanne.obj")).toMeshData().triangulate()
+
+            val slices = 25
+            val sliceStep = 0.1
+            val sliceWidth = 0.14
+
+            val sliceVBs = (0 until slices).map {
+                val projector = buildTransform {
+                    translate(0.0, 0.0, -1.0 + it * sliceStep)
+                }
+                val decal = obj.decal(projector, Vector3(4.0, 4.0, sliceWidth))
+                val vb = decal.toVertexBuffer()
+                vb
+            }
+
+            extend(Orbital()) {
+                eye = Vector3(0.0, 0.0, 2.0)
+            }
+            extend {
+                drawer.shadeStyle = shadeStyle {
+                    fragmentTransform = """x_fill.rgb = v_viewNormal.rgb * 0.5 + 0.5; """
+                }
+
+                drawer.translate(0.0, 0.0, slices * 0.5 * 0.5)
+                for (i in 0 until sliceVBs.size) {
+                    drawer.vertexBuffer(sliceVBs[i], DrawPrimitive.TRIANGLES)
+                    drawer.translate(0.0, 0.0, -0.5)
+                }
+            }
+        }
+    }
+}