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95 lines
3.4 KiB
95 lines
3.4 KiB
//
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// Created by 14727 on 2022/12/9.
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//
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#ifndef NURBSEVALUATOR_NURBS_SURFACE_CUH
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#define NURBSEVALUATOR_NURBS_SURFACE_CUH
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#include <vector>
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#include "cuda_runtime.h"
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#include "bvh.cuh"
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namespace NurbsSurface {
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const int POINT_SIZE = 4;
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/**
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* 曲线计算的核函数
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* @param d_pointSize 点的大小(3: [x, y, z] | 4：[x, y, z, w])
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*/
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__global__ static void
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g_evaluate(float* res, const float *d_nTexture_u, const float *d_nTexture_v, const float *d_points, int d_pointsCnt_u,
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int d_pointsCnt_v, int d_pointSize, float d_lastKnot_u, float d_lastKnot_v, int d_sampleCnt_u,
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int d_sampleCnt_v);
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__global__ static void
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g_derivative(float *derivatives, const float *derTexture_u, const float *derTexture_v, const float *nTexture_u,
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const float *nTexture_v,
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const float *d_points, int d_pointsCnt_u, int d_pointsCnt_v, int d_pointSize, float d_lastKnot_u,
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float d_lastKnot_v, int d_sampleCnt_u, int d_sampleCnt_v);
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__global__ static void
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g_curvature(const float *derivatives, int sampleCnt_u, int sampleCnt_v, float lastKnot_u, float lastKnot_v, float *ms, float*k);
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class Surface {
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private:
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std::vector<std::vector<std::vector<float>>> controlPoints;
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float *d_points;
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std::vector<float> knots_u;
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std::vector<float> knots_v;
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float *d_knots_u;
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float *d_knots_v;
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bool recordTime;
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float *d_nTexture_u; // u方向指向度为p时的device中的nurbs基函数矩阵
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float *d_nTexture_v; // v方向指向度为p时的device中的nurbs基函数矩阵
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float *d_nTexture1_u; // u方向指向度为p-1时的device中的nurbs基函数矩阵
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float *d_nTexture1_v; // v方向指向度为p-1时的device中的nurbs基函数矩阵
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float *d_evaluationRes; // evaluation结果
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float *d_derivatives; // 一阶导计算结果
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float *d_k; // 最大曲率
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BVH bvh;
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public:
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/**
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* 构造函数
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* @param controlPoints 控制点矩阵[pointsCnt_u][pointsCnt_v][3]
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* @param knots_u u方向knots
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* @param knots_v v方向knots
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*/
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__host__ explicit Surface(std::vector<std::vector<std::vector<float>>> controlPoints,
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std::vector<float> knots_u, std::vector<float> knots_v);
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/**
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* 供外部CPU程序使用的、负责调用gpu并行计算的方法
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* @param sampleCnt_u u方向采样数目
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* @param sampleCnt_v v方向采样数目
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* @return 由 map 组成的vector{<<u, v>, {x, y, z}>}
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*/
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__host__ std::vector<std::vector<std::vector<float>>>
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evaluate(int sampleCnt_u_, int sampleCnt_v_);
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/**
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* 供外部CPU程序使用的、负责调用gpu并行计算切向量的方法
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*/
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__host__ void derivative(int sampleCnt_u, int sampleCnt_v);
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/**
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* 供外部CPU程序使用的、负责调用gpu并行计算二阶导的方法
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*/
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__host__ void curvature(int sampleCnt_u, int sampleCnt_v);
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/**
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* 供外部CPU程序使用的、负责调用gpu并行计算BVH的方法
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*/
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__host__ void buildBHV(int sampleCnt_u, int sampleCnt_v);
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void setRecordTime(bool r);
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~Surface();
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};
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}
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#endif //NURBSEVALUATOR_NURBS_SURFACE_CUH
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