[orx-mesh, orx-obj-loader] Separate into commonMain and jvmMain

orx-obj-loader/src/jvmDemo/kotlin/DemoObjLoader01.kt

@@ -0,0 +1,31 @@
+import org.openrndr.application
+import org.openrndr.color.ColorRGBa
+import org.openrndr.draw.DepthTestPass
+import org.openrndr.draw.DrawPrimitive
+import org.openrndr.draw.shadeStyle
+import org.openrndr.extra.objloader.loadOBJasVertexBuffer
+import org.openrndr.math.Vector3
+
+fun main() = application {
+    program {
+        val mesh = loadOBJasVertexBuffer("demo-data/obj-models/suzanne/Suzanne.obj")
+
+        extend {
+            drawer.perspective(60.0, width * 1.0 / height, 0.01, 1000.0)
+            drawer.depthWrite = true
+            drawer.depthTestPass = DepthTestPass.LESS_OR_EQUAL
+            drawer.fill = ColorRGBa.PINK
+            drawer.shadeStyle = shadeStyle {
+                fragmentTransform = """
+                        vec3 lightDir = normalize(vec3(0.3, 1.0, 0.5));
+                        float l = dot(va_normal, lightDir) * 0.4 + 0.5;
+                        x_fill.rgb *= l; 
+                    """.trimIndent()
+            }
+            drawer.translate(0.0, 0.0, -2.0)
+            drawer.rotate(Vector3.UNIT_X, -seconds * 2 + 30)
+            drawer.rotate(Vector3.UNIT_Y, -seconds * 15 + 20)
+            drawer.vertexBuffer(mesh, DrawPrimitive.TRIANGLES)
+        }
+    }
+}