Instructions for use

During the implementation of 3D space technology in SuperMap GIS products, stereo display effects maximize the 3D visual experience. Stereo display combines the most advanced computer hardware and software technologies with 3D visualization, featuring powerful functionality, superior performance, and realistic effects. The application of stereo display breaks the limitations of 2D screens for 3D space display, allowing users to gain unprecedented visual experiences, thus realizing true 3D visualization in GIS.

The application of stereo display ranges from high-end to civilian use. High-end applications include visualization solutions based on virtual reality and simulation technologies for military and research institutions. Everyday accessible applications include educational and entertaining 3D stereo displays in venues like science museums. Below, we will detail these stereo display solutions, offering an impressive visual feast.

Principle of stereo effect display: Humans use both eyes to view the same object. The angles seen by each eye differ, resulting in slightly different images formed on the retinas. The brain synthesizes these two images to distinguish the front, back, near, and far of objects, creating stereoscopic vision. The principle of stereo imaging involves using a set of devices to present separate images to each eye, which are then processed by the brain to produce a 3D effect.

Switching from non-stereo mode to another stereo display mode activates the corresponding 3D stereo display effects. 3D stereo display requires activating these effects and using appropriate devices to immerse users in the 3D scene.

Functional Entry

• Scene tab -> Properties group -> stereo mode button

Parameter description

Stereo Mode

• Non-stereo: Ordinary 3D scene mode.
• Anaglyphic: Displays stereo effects using red-blue color filtering devices.
• Quad buffer: Achieves stereo effects using quad buffering graphics cards and shutter glasses to acquire images.
• Horizontal split: Implements stereo imaging by projecting from left and right using two devices, combined with polarized filtering principles.
• Vertical split: Implements stereo imaging by projecting from top and bottom using two devices, combined with polarized filtering principles.
• OculusVR: Experience immersive scene effects by wearing Oculus VR virtual headset devices.
• HTC Vive: Supports connecting to HTC Vive virtual reality headsets.

To use OculusVR/HTC Vive mode, set the scene's walking mode to one of 'keyboard-driven', 'automatic walk', or 'automatic run', and enable collision detection.

Parallax Mode

• Positive parallax: In positive parallax mode, objects appear to extend into the screen. This is mainly adjusted by the "View Angle" (unit: radians) and "Depth" (unit: millimeters) parameters to regulate the visual distance perception of the scene.
• Negative parallax: In negative parallax mode, objects appear to protrude out of the screen. Adjust the visual distance perception by setting the "Depth" (unit: millimeters) parameter.

Speed Multiplier

• This parameter can be set when stereo mode is HTC Vive, used to control the speed of HTC controllers.

Notes

In negative parallax, the view angle cannot be adjusted. In positive parallax, adjustments to the depth parameter have a minimal impact on visual distance perception.

The depth parameter adjustment range is -1000 to 1000.

Related Topics

Principle of Stereo Display Technology

Solution