Hi.
Is there any documentaiton for the shader editor that is available in the SceneKit editor in the Xcode 9 beta?
Searching the Xocde help docs has not revealed anything aside for adding shders to sprite kit scenes.
The editor is made available when a node in the scene graph is selected. A pane is displayed which allows you to edit actions or shaders for each material belonging to the selected node.
When I clcik the help button in the source code window, the folliwing is displayed in a popover.
/
Access: ReadWrite
Stages: Vertex shader only
*/
struct {
float4x4 viewTransform;
float4x4 inverseViewTransform; /
float4x4 projectionTransform;
float4x4 viewProjectionTransform;
float4x4 viewToCubeTransform; /
float4 ambientLightingColor;
float4 fogColor;
float3 fogParameters; /
float2 inverseResolution;
float time;
float sinTime;
float cosTime;
float random01;
/
float environmentIntensity;
float4x4 inverseProjectionTransform;
float4x4 inverseViewProjectionTransform;
} scn_frame;
struct {
float4x4 modelTransform;
float4x4 inverseModelTransform;
float4x4 modelViewTransform;
float4x4 inverseModelViewTransform;
float4x4 normalTransform; /
float4x4 modelViewProjectionTransform;
float4x4 inverseModelViewProjectionTransform;
float2x3 boundingBox;
float2x3 worldBoundingBox;
} scn_node;
struct SCNShaderGeometry {
vec4 position;
vec3 normal;
vec4 tangent;
vec4 color;
vec2 texcoords[kSCNTexcoordCount];
} _geometry;
What is the main entrty point for the shader program for a geometry modifer?
Some clues would be greatly appericated as to how a shader should be constructed to be added to a scene file.
I really want to use this new feature as being able to develop and test shaders from within Xcocei could be a real time saver. I have done a bit of Open GL shader programing with Sprtie Kit in the past; my knowledge of metal shders is minimal .
