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float-array.cpp
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float-array.cpp
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#include "js-support.h"
#include "mytypes.h"
#include "xerror.h"
#include "Mat3.h"
#include "Vec3.h"
#include <iostream>
#include <vector>
#include <limits>
#include <sstream>
#include <memory>
#include <mujs.h>
const char *TAG_FloatArray4 = "FloatArray4"; // non-static: used externally
const char *TAG_FloatArray8 = "FloatArray8"; // non-static: used externally
#define CastGetArgVec3(n) Vec3ToType<double,Float>::convert(GetArgVec3(n))
#define CastGetArgMat3x3(n) Mat3ToType<double,Float>::convert(GetArgMat3x3(n))
// FloatArray: "accelerated" array of double-size floating point numbers
template<typename Float>
class FloatArray : public std::vector<Float> {
typedef std::vector<Float> V;
public:
FloatArray() { } // created with size 0
FloatArray(const FloatArray &other) : V(other) { } // copy constructor
void muln(Float m) {
for (auto &f : *this)
f *= m;
}
void divn(Float m) {
for (auto &f : *this)
f /= m;
}
void mulMat3PlusVec3(const TMat3<Float> &m, const TVec3<Float> &v) {
if (V::size() % 3 != 0)
ERROR("FloatArray.mulMat3PlusVec3: size=" << V::size() << " isn't a multiple of 3")
for (auto it = V::begin(), ite = V::end(); it != ite; it += 3) {
union {TVec3<Float> *vec; Float *f;};
f = &*it;
*vec = m*(*vec) + v;
}
}
FloatArray* createMulMat3PlusVec3(const TMat3<Float> &m, const TVec3<Float> &v) {
if (V::size() % 3 != 0)
ERROR("FloatArray.mulMat3PlusVec3: size=" << V::size() << " isn't a multiple of 3")
std::unique_ptr<FloatArray> output(new FloatArray);
output->reserve(V::size());
for (auto it = V::begin(), ite = V::end(); it != ite; it += 3) {
union {TVec3<Float> *vec; Float *f;};
f = &*it;
auto val = m*(*vec) + v;
output->push_back(val(X));
output->push_back(val(Y));
output->push_back(val(Z));
}
return output.release();
}
void mulScalarPlusVec3(const TVec3<Float> &scalar, const TVec3<Float> &v) {
if (V::size() % 3 != 0)
ERROR("FloatArray.mulScalarPlusVec3: size=" << V::size() << " isn't a multiple of 3")
for (auto it = V::begin(), ite = V::end(); it != ite; it += 3) {
union {TVec3<Float> *vec; Float *f;};
f = &*it;
*vec = (*vec).scale(scalar) + v;
}
}
std::vector<std::pair<Float,Float>> bbox(unsigned dim) const {
// checks
if (V::empty())
ERROR("FloatArray.bbox: computing the bbox of an empty arry doesn't make sense");
if (V::size() % dim != 0)
ERROR("FloatArray.bbox: size=" << V::size() << " isn't a multiple of a requested dim=" << dim)
// initialize bb
std::vector<std::pair<Float,Float>> bb;
bb.reserve(dim);
while (bb.size() < dim)
bb.push_back(std::pair<Float,Float>(std::numeric_limits<Float>::max(), std::numeric_limits<Float>::min()));
// compute bbox
auto ib = bb.begin(), ie = bb.end(), i = ib;
for (auto v : *this) {
if (v < i->first)
i->first = v;
if (v > i->second)
i->second = v;
if (++i == ie)
i = ib;
}
return bb;
}
}; // FloatArray
namespace JsBinding {
namespace JsFloatArray {
template<typename Float> const char* tag();
template<> const char* tag<float>() {return TAG_FloatArray4;}
template<> const char* tag<double>() {return TAG_FloatArray8;}
template<typename Float> const char* cls();
template<> const char* cls<float>() {return "FloatArray4";}
template<> const char* cls<double>() {return "FloatArray8";}
template<typename Float>
static void xnewo(js_State *J, FloatArray<Float> *d) {
js_getglobal(J, tag<Float>());
js_getproperty(J, -1, "prototype");
js_newuserdata(J, tag<Float>(), d, [](js_State *J, void *p) {
delete (FloatArray<Float>*)p;
});
}
template<typename Float>
void init(js_State *J) {
JsSupport::beginDefineClass(J, tag<Float>(), [](js_State *J) {
AssertNargs(0)
ReturnObj(new FloatArray<Float>);
});
{ // methods
ADD_METHOD_CPPc(cls<Float>(), toString, {
AssertNargs(0)
std::ostringstream ss;
ss << "[";
bool fst = true;
for (auto v : *GetArgExt(FloatArray<Float>, tag<Float>(), 0)) {
if (!fst)
ss << ",";
ss << v;
fst = false;
}
ss << "]";
Return(J, ss.str());
}, 0)
ADD_METHOD_CPPc(cls<Float>(), size, {
AssertNargs(0)
Return(J, (unsigned)GetArgExt(FloatArray<Float>, tag<Float>(), 0)->size());
}, 0)
ADD_METHOD_CPPc(cls<Float>(), copy, {
AssertNargs(0)
ReturnObj(new FloatArray<Float>(*GetArgExt(FloatArray<Float>, tag<Float>(), 0)));
}, 0)
ADD_METHOD_CPPc(cls<Float>(), resize, {
AssertNargs(1)
GetArgExt(FloatArray<Float>, tag<Float>(), 0)->resize(GetArgUInt32(1));
ReturnVoid(J);
}, 1)
ADD_METHOD_CPPc(cls<Float>(), append, {
AssertNargs(1)
GetArgExt(FloatArray<Float>, tag<Float>(), 0)->push_back(GetArgFloat(1));
ReturnVoid(J);
}, 1)
ADD_METHOD_CPPc(cls<Float>(), append2, {
AssertNargs(2)
auto a = GetArgExt(FloatArray<Float>, tag<Float>(), 0);
a->push_back(GetArgFloat(1));
a->push_back(GetArgFloat(2));
ReturnVoid(J);
}, 2)
ADD_METHOD_CPPc(cls<Float>(), append3, {
AssertNargs(3)
auto a = GetArgExt(FloatArray<Float>, tag<Float>(), 0);
a->push_back(GetArgFloat(1));
a->push_back(GetArgFloat(2));
a->push_back(GetArgFloat(3));
ReturnVoid(J);
}, 3)
ADD_METHOD_CPPc(cls<Float>(), append4, {
AssertNargs(4)
auto a = GetArgExt(FloatArray<Float>, tag<Float>(), 0);
a->push_back(GetArgFloat(1));
a->push_back(GetArgFloat(2));
a->push_back(GetArgFloat(3));
a->push_back(GetArgFloat(4));
ReturnVoid(J);
}, 3)
ADD_METHOD_CPPc(cls<Float>(), get, {
AssertNargs(1)
Return(J, (*GetArgExt(FloatArray<Float>, tag<Float>(), 0))[GetArgUInt32(1)]);
}, 1)
ADD_METHOD_CPPc(cls<Float>(), set, {
AssertNargs(2)
(*GetArgExt(FloatArray<Float>, tag<Float>(), 0))[GetArgUInt32(1)] = GetArgFloat(2);
ReturnVoid(J);
}, 2)
ADD_METHOD_CPPc(cls<Float>(), muln, {
AssertNargs(1)
GetArgExt(FloatArray<Float>, tag<Float>(), 0)->muln(GetArgFloat(1));
ReturnVoid(J);
}, 1)
ADD_METHOD_CPPc(cls<Float>(), divn, {
AssertNargs(1)
GetArgExt(FloatArray<Float>, tag<Float>(), 0)->divn(GetArgFloat(1));
ReturnVoid(J);
}, 1)
ADD_METHOD_CPPc(cls<Float>(), mulMat3PlusVec3, {
AssertNargs(2)
GetArgExt(FloatArray<Float>, tag<Float>(), 0)->mulMat3PlusVec3(CastGetArgMat3x3(1), CastGetArgVec3(2));
ReturnVoid(J);
}, 2)
ADD_METHOD_CPPc(cls<Float>(), createMulMat3PlusVec3, {
AssertNargs(2)
ReturnObj(GetArgExt(FloatArray<Float>, tag<Float>(), 0)->createMulMat3PlusVec3(CastGetArgMat3x3(1), CastGetArgVec3(2)));
}, 2)
ADD_METHOD_CPPc(cls<Float>(), mulScalarPlusVec3, {
AssertNargs(2)
GetArgExt(FloatArray<Float>, tag<Float>(), 0)->mulScalarPlusVec3(CastGetArgVec3(1), CastGetArgVec3(2));
ReturnVoid(J);
}, 2)
ADD_METHOD_CPPc(cls<Float>(), bbox, {
AssertNargs(1)
Return(J, GetArgExt(FloatArray<Float>, tag<Float>(), 0)->bbox(GetArgUInt32(1)));
}, 1)
}
JsSupport::endDefineClass(J);
}
void initFloat4(js_State *J) {
init<float>(J);
}
void initFloat8(js_State *J) {
init<double>(J);
}
} // JsFloatArray
} // JsBinding