I am trying to create a spot light that illuminates a cube. The surface below should show a shadow. Unfortunately, I could not achieve this. Light ignores the cube and transmits light both on the surface and on the cube - regardless of whether the cube is in the way.
What does it look like:
In the code, I just installed castsShadow on YES on each node for testing, but nothing helped:
BOOL shadows = YES; _baseNode.castsShadow = shadows; _scene.rootNode.castsShadow = shadows; SCNBox *box = [SCNBox boxWithWidth: 50 height: 50 length: 50 chamferRadius: 10]; box.firstMaterial.diffuse.contents = [UIColor colorWithRed: 0.0 green:0.0 blue: 0.8 alpha: 1.0]; box.firstMaterial.doubleSided = YES; SCNNode *boxNode = [SCNNode nodeWithGeometry: box]; boxNode.position = SCNVector3Make(100, 100, 100); boxNode.castsShadow = shadows; [_baseNode addChildNode: boxNode]; SCNBox *plane = [SCNBox boxWithWidth: 1000 height:1000 length: 40 chamferRadius: 10]; plane.firstMaterial.diffuse.contents = [UIColor colorWithWhite: 0.2 alpha: 1.0]; SCNNode *planeNode = [SCNNode nodeWithGeometry: plane]; planeNode.position = SCNVector3Make(100, 100, 0); planeNode.castsShadow = shadows; [_baseNode addChildNode: planeNode]; SCNNode *lightNode = [SCNNode node]; lightNode.light = [SCNLight light]; lightNode.light.type = SCNLightTypeSpot; lightNode.light.spotInnerAngle = 0; lightNode.light.spotOuterAngle = 45; lightNode.light.shadowRadius = 10.0; lightNode.light.zFar = 10000; lightNode.light.shadowColor = [UIColor colorWithRed: 0.0 green: 1.0 blue:0.0 alpha: 1.0]; lightNode.castsShadow = shadows; lightNode.position = SCNVector3Make(100, 100, 170); [_baseNode addChildNode:lightNode]; SCNNode *lightNode2 = [SCNNode node]; lightNode2.light = [SCNLight light]; lightNode2.light.type = SCNLightTypeAmbient; lightNode2.light.color = [UIColor colorWithRed: 0.3 green: 0.3 blue:0.3 alpha: 1.0]; [_baseNode addChildNode: lightNode2]; [_scene.rootNode addChildNode: _baseNode];
}
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