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3D raycast

Find 3D objects that cross a line.

Authors and contributors to this experimental extension: D8H.

Warning

This is an extension made by a community member and it only got through a light review by the GDevelop extension team. As such, we can't guarantee it meets all the quality standards of fully reviewed extensions.

It can be useful to:

  • Find 3D objects under the pointer
  • Target objects from a 1st person view
  • Make AI that detect objects in their field of view

Tip

Learn how to install new extensions by following a step-by-step guide.

Conditions

Last recast distance
Compare the last recast intersection distance.

See parameters
  • Parameter 1: 🟰 Relational operator
  • Parameter 2 (🔢 Number): Value to compare

Technical note: parameters 0, 3 are internal parameters handled by GDevelop.

Raycast to a position
Sends a ray from the given source position to the final point, intersecting the closest object. The intersected object will become the only one taken into account.

See parameters
  • Parameter 1 (👾 Object): Objects to test against the ray
  • Parameter 2 (🔢 Number): Ray source X position
  • Parameter 3 (🔢 Number): Ray source Y position
  • Parameter 4 (🔢 Number): Ray source Z position
  • Parameter 5 (🔢 Number): Ray target X position
  • Parameter 6 (🔢 Number): Ray target Y position
  • Parameter 7 (🔢 Number): Ray target Z position

Technical note: parameters 0, 8 are internal parameters handled by GDevelop.

Raycast from camera center
Sends a ray from the center of the camera, intersecting the closest object. The intersected object will become the only one taken into account.

See parameters
  • Parameter 1 (👾 Object): Objects to test against the ray
  • Parameter 2 (🔢 Number): Ray maximum distance (in pixels)

Technical note: parameters 0, 3 are internal parameters handled by GDevelop.

Raycast from cursor
Sends a ray from the cursor on the camera screen, intersecting the closest object. The intersected object will become the only one taken into account.

See parameters
  • Parameter 1 (👾 Object): Objects to test against the ray
  • Parameter 2 (🔤 Layer name (String)): 2D layer
  • Parameter 3 (🔢 Number): Ray maximum distance (in pixels)

Technical note: parameters 0, 4 are internal parameters handled by GDevelop.

Raycast from a camera point
Sends a ray from the given source point on the camera screen, intersecting the closest object. The intersected object will become the only one taken into account.

See parameters
  • Parameter 1 (👾 Object): Objects to test against the ray
  • Parameter 2 (🔢 Number): X position on the screen (from 0 to 1)
  • Parameter 3 (🔢 Number): Y position on the screen (from 0 to 1)
  • Parameter 4 (🔢 Number): Ray maximum distance (in pixels)

Technical note: parameters 0, 5 are internal parameters handled by GDevelop.

Raycast
Sends a ray from the given source position and angle, intersecting the closest object. The intersected object will become the only one taken into account.

See parameters
  • Parameter 1 (👾 Object): Objects to test against the ray
  • Parameter 2 (🔢 Number): Ray source X position
  • Parameter 3 (🔢 Number): Ray source Y position
  • Parameter 4 (🔢 Number): Ray source Z position
  • Parameter 5 (🔢 Number): Rotation angle (in degrees)
  • Parameter 6 (🔢 Number): Elevation angle (in degrees)
  • Parameter 7 (🔢 Number): Ray maximum distance (in pixels)

Technical note: parameters 0, 8 are internal parameters handled by GDevelop.

Expressions

Expression Description
Raycaster3D::Distance() Return the last recast intersection distance.
Raycaster3D::IntersectionX() Return the last recast intersection position on X axis.
Raycaster3D::IntersectionY() Return the last recast intersection position on Y axis.
Raycaster3D::IntersectionZ() Return the last recast intersection position on Z axis.
Raycaster3D::NormalX() Return the last recast intersection normal on X axis.
Raycaster3D::NormalY() Return the last recast intersection normal on X axis.
Raycaster3D::NormalZ() Return the last recast intersection normal on Z axis.

This page is an auto-generated reference page about the 3D raycast extension, made by the community of GDevelop, the open-source, cross-platform game engine designed for everyone. Learn more about all GDevelop community-made extensions here.