Class NVRayTracing


  • public class NVRayTracing
    extends java.lang.Object
    Rasterization has been the dominant method to produce interactive graphics, but increasing performance of graphics hardware has made ray tracing a viable option for interactive rendering. Being able to integrate ray tracing with traditional rasterization makes it easier for applications to incrementally add ray traced effects to existing applications or to do hybrid approaches with rasterization for primary visibility and ray tracing for secondary queries.

    To enable ray tracing, this extension adds a few different categories of new functionality:

    • Acceleration structure objects and build commands
    • A new pipeline type with new shader domains
    • An indirection table to link shader groups with acceleration structure items

    This extension adds support for the following SPIR-V extension in Vulkan:

    • SPV_NV_ray_tracing
    Sample Code

    Example ray generation GLSL shader

    
     #version 450 core
     #extension GL_NV_ray_tracing : require
     layout(set = 0, binding = 0, rgba8) uniform image2D image;
     layout(set = 0, binding = 1) uniform accelerationStructureNV as;
     layout(location = 0) rayPayloadNV float payload;
     
     void main()
     {
        vec4 col = vec4(0, 0, 0, 1);
     
        vec3 origin = vec3(float(gl_LaunchIDNV.x)/float(gl_LaunchSizeNV.x), float(gl_LaunchIDNV.y)/float(gl_LaunchSizeNV.y), 1.0);
        vec3 dir = vec3(0.0, 0.0, -1.0);
     
        traceNV(as, 0, 0xff, 0, 1, 0, origin, 0.0, dir, 1000.0, 0);
     
        col.y = payload;
     
        imageStore(image, ivec2(gl_LaunchIDNV.xy), col);
     }
    Name String
    VK_NV_ray_tracing
    Extension Type
    Device extension
    Registered Extension Number
    166
    Revision
    3
    Extension and Version Dependencies
    Contact
    Last Modified Date
    2018-11-20
    Interactions and External Dependencies
    Contributors
    • Eric Werness, NVIDIA
    • Ashwin Lele, NVIDIA
    • Robert Stepinski, NVIDIA
    • Nuno Subtil, NVIDIA
    • Christoph Kubisch, NVIDIA
    • Martin Stich, NVIDIA
    • Daniel Koch, NVIDIA
    • Jeff Bolz, NVIDIA
    • Joshua Barczak, Intel
    • Tobias Hector, AMD
    • Henrik Rydgard, NVIDIA
    • Pascal Gautron, NVIDIA