Arrays of Varyings in TSL

In TSL (Taichi Shading Language), the syntax for declaring varyings is different from GLSL. TSL doesn't use the varying keyword directly like GLSL does.

Instead, in TSL, you should use the @varying decorator to mark variables that should be interpolated between shader stages. For arrays, you would typically define them as part of a struct.

Here's how you can declare an array of varyings in TSL:

PYTHONCopied
@ti.data_oriented
class MyShader:
    @ti.struct_field
    class Varyings:
        myArray: ti.types.vector(LENGTH, ti.f32)  # For a float array of LENGTH elements

    @ti.kernel
    def vertex_shader(self):
        # Set values to the varying array
        for i in range(LENGTH):
            self.varyings.myArray[i] = some_value

    @ti.kernel
    def fragment_shader(self):
        # Access the interpolated values
        for i in range(LENGTH):
            result = self.varyings.myArray[i]
            # Use the values...

Alternatively, if you need individual float varyings rather than a vector, you can use:

PYTHONCopied
@ti.struct_field
class Varyings:
    # Define individual float varyings
    myArray0: ti.f32
    myArray1: ti.f32
    myArray2: ti.f32
    # ... and so on for the number of elements you need

Remember that in TSL, varyings are typically organized within a struct and accessed through the shader class instance.