shmuelzon
Newbie
Israel
Joined: Dec 24, 2023
Post Count: 7
Status:
Offline
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Re: Mapping Floor Plan Coordinates to Render/3DView Coordiantes
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I finally got it to work, thanks Daniele!
For future reference, if anyone will stumble upon this post, here's what I ended up with:
int renderWidth = 1024;
int renderHeight = 576;
/* Set up */
Camera camera = getHome().getCamera();
cameraPosition = new Vector4d(camera.getX(), camera.getZ(), camera.getY(), 0);
Transform3D yawRotation = new Transform3D();
yawRotation.rotY(camera.getYaw());
Transform3D pitchRotation = new Transform3D();
pitchRotation.rotX(-camera.getPitch());
Transform3D perspectiveTransform = new Transform3D();
perspectiveTransform.perspective(camera.getFieldOfView(), (double)renderWidth / renderHeight, 0.1, 100);
perspectiveTransform.mul(pitchRotation);
perspectiveTransform.mul(yawRotation);
HomePieceOfFurniture furniture = /* Get some furniture... */;
Vector4d objectPosition = new Vector4d(furniture.getX(), furniture.getElevation(), furniture.getY(), 0);
objectPosition.sub(cameraPosition);
perspectiveTransform.transform(objectPosition);
objectPosition.scale(1 / objectPosition.w);
System.out.println(String.format("Projected pixel: (%d, %d)",
(int)((objectPosition.x * 0.5 + 0.5) * renderWidth),
(int)((objectPosition.y * 0.5 + 0.5) * renderHeight)
));
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[Jan 15, 2024, 5:59:32 PM]
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[Link]
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