index.h

#include <device_launch_parameters.h>
#include <glm/glm.hpp>

#define T_IDX threadIdx.x
#define T_IDX2 glm::uvec2(threadIdx.x, threadIdx.y)
#define T_IDX3 glm::uvec3(threadIdx.x, threadIdx.y, threadIdx.z)
#define B_IDX blockIdx.x
#define B_IDX2 glm::uvec2(blockIdx.x, blockIdx.y)
#define B_IDX3 glm::uvec3(blockIdx.x, blockIdx.y, blockIdx.z)
#define IDX blockIdx.x *blockDim.x + threadIdx.x
#define IDX2 glm::uvec2(blockIdx.x *blockDim.x + threadIdx.x, blockIdx.y * blockDim.y + threadIdx.y)
#define IDX3                                                                                       \
    glm::uvec3(blockIdx.x *blockDim.x + threadIdx.x, blockIdx.y * blockDim.y + threadIdx.y,        \
               blockIdx.z * blockDim.z + threadIdx.z)
#define FLAT_INDEX utils::cuda::flattenIdx(IDX3)
#define DEFINE_IDX(__var1__) uint __var1__ = blockIdx.x * blockDim.x + threadIdx.x;
#define DEFINE_IDX2(__var1__, __var2__)                                                            \
    uint __var1__ = blockIdx.x * blockDim.x + threadIdx.x;                                         \
    uint __var2__ = blockIdx.y * blockDim.y + threadIdx.y;
#define DEFINE_IDX3(__var1__, __var2__, __var3__)                                                  \
    uint __var1__ = blockIdx.x * blockDim.x + threadIdx.x;                                         \
    uint __var2__ = blockIdx.y * blockDim.y + threadIdx.y;                                         \
    uint __var3__ = blockIdx.z * blockDim.z + threadIdx.z;
#define DEFINE_FLAT_INDEX(__var1__) uint __var1__ = FLAT_INDEX;

namespace utils::cuda {
    __device__ __forceinline__ uint flattenIdx(glm::uvec3 idx3) {
        return idx3.x + idx3.y * blockDim.x * gridDim.x +
               idx3.z * blockDim.x * gridDim.x * blockDim.y * gridDim.y;
    }
    __device__ __forceinline__ uint flattenIdx(glm::uvec2 idx2) {
        return idx2.x + idx2.y * blockDim.x * gridDim.x;
    }
} // namespace utils::cuda