[orx-dnk3] Work-around problems with GLES back-end

orx-jvm/orx-dnk3/src/main/kotlin/Facet.kt

@@ -109,7 +109,7 @@ class ViewDepthFacet : ColorBufferFacetCombiner(setOf(FacetType.VIEW_POSITION),
     override fun generateShader(): String = "o_$targetOutput.r = v_viewPosition.z;"
 }
 class ClipDepthFacet : ColorBufferFacetCombiner(setOf(FacetType.CLIP_POSITION), "clipDepth", ColorFormat.R, ColorType.FLOAT32) {
-    override fun generateShader(): String = "o_$targetOutput.r = gl_FragCoord.z;"
+    override fun generateShader(): String = "o_$targetOutput = gl_FragCoord.z;"
 }
 
 

orx-jvm/orx-dnk3/src/main/kotlin/PBRMaterial.kt

@@ -644,7 +644,7 @@ class PBRMaterial : Material {
                                         light.projection(it) * look)
 
                                 if (light.shadows is Shadows.DepthMappedShadows) {
-                                    shadeStyle.parameter("lightShadowMap$index", it.depthBuffer ?: TODO())
+                                    shadeStyle.parameter("lightShadowMap$index", it.depthBuffer?:error("no depth buffer for $it"))
                                 }
 
                                 if (light.shadows is Shadows.ColorMappedShadows) {

orx-jvm/orx-dnk3/src/main/kotlin/RenderPass.kt

@@ -20,7 +20,7 @@ val IrradianceProbePass = RenderPass(listOf(DiffuseIrradianceFacet()))
 
 val DefaultOpaquePass = RenderPass(listOf(LDRColorFacet()), renderOpaque = true, renderTransparent = false)
 val DefaultTransparentPass = RenderPass(listOf(LDRColorFacet()), renderOpaque = false, renderTransparent = true, depthWrite = false)
-val LightPass = RenderPass(emptyList())
+val LightPass = RenderPass(listOf(ClipDepthFacet()))
 val VSMLightPass = RenderPass(listOf(MomentsFacet()))
 
 fun RenderPass.createPassTarget(width: Int, height: Int, depthFormat: DepthFormat = DepthFormat.DEPTH24, multisample: BufferMultisample = this.multisample): RenderTarget {
@@ -31,6 +31,10 @@ fun RenderPass.createPassTarget(width: Int, height: Int, depthFormat: DepthForma
                     colorBuffer(combiner.targetOutput, combiner.format, combiner.type)
             }
         }
+        // Temporary fix for GLES back-end
+        if (combiners.isEmpty()) {
+            colorBuffer()
+        }
         depthBuffer(depthFormat)
     }
 }

orx-jvm/orx-dnk3/src/main/kotlin/SceneRenderer.kt

@@ -86,8 +86,6 @@ class SceneRenderer {
                     val mapSize = (shadowLight.shadows as Shadows.MappedShadows).mapSize
                     pass.createPassTarget(mapSize, mapSize, DepthFormat.DEPTH_STENCIL)
                 }
-                target.clearDepth(depth = 1.0)
-
                 val look = shadowLight.view(it.node)
                 val materialContext = MaterialContext(pass, context.lights, context.fogs, shadowLightTargets, emptyMap(), 0)
                 drawer.isolatedWithTarget(target) {