[orx-noise] Add hash functions

orx-mesh-generators/src/jvmDemo/kotlin/decal/DemoDecal01.kt

@@ -13,6 +13,7 @@ import java.io.File
 
 /**
  * Demonstrate decal generator as an object slicer
+ * @see <img src="https://raw.githubusercontent.com/openrndr/orx/media/orx-mesh-generators/images/decal-DemoDecal01Kt.png">
  */
 fun main() {
     application {

orx-mesh-generators/src/jvmDemo/kotlin/decal/DemoDecal02.kt

@@ -15,6 +15,7 @@ import kotlin.math.PI
 
 /**
  * Demonstrate decal generation and rendering
+ * @see <img src="https://raw.githubusercontent.com/openrndr/orx/media/orx-mesh-generators/images/decal-DemoDecal02Kt.png">
  */
 fun main() {
     application {

orx-mesh-generators/src/jvmDemo/kotlin/tangents/DemoTangents01.kt

@@ -0,0 +1,39 @@
+package tangents
+
+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.toVertexBuffer
+import org.openrndr.extra.meshgenerators.tangents.estimateTangents
+import org.openrndr.extra.objloader.loadOBJMeshData
+import org.openrndr.math.Vector3
+import java.io.File
+
+fun main() = application {
+    program {
+        val obj = loadOBJMeshData(File("demo-data/obj-models/suzanne/Suzanne.obj")).toMeshData().triangulate()
+        val tangentObj = obj.estimateTangents()
+
+        val objVB = tangentObj.toVertexBuffer()
+
+        extend(Orbital()) {
+            eye = Vector3(0.0, 0.0, 2.0)
+        }
+        extend {
+            drawer.shadeStyle = shadeStyle {
+                fragmentTransform = """
+                    vec3 viewTangent = (u_viewNormalMatrix * u_modelNormalMatrix * vec4(va_tangent, 0.0)).xyz;
+                    vec3 viewBitangent = (u_viewNormalMatrix * u_modelNormalMatrix * vec4(va_bitangent, 0.0)).xyz;
+                    float c = cos(100.0*dot(v_worldPosition, va_normal)) * 0.5 + 0.5;
+                    
+                    //x_fill.rgb = normalize(viewTangent)*0.5+0.5;
+                     x_fill.rgb = vec3(c); 
+                     """.trimIndent()
+
+            }
+
+            drawer.vertexBuffer(objVB, DrawPrimitive.TRIANGLES)
+        }
+    }
+}