C++ Arduino Vector issues with mismatched types?
Question
I've been trying to write some effects for a strip of RGB LEDs to be controlled via an Arduino Uno R3. For context, I'm working on the animation of a ball (a set of 5 LEDs) moving backwards and forward along the strip, bouncing from time to time.
The vector causing issue is the Colour object, which I want to be a vector of CRGB colours which, when fewer than the number of colours available are passed to the function, it simply uses the first x amount but if there are more balls than there are colours then it should simply re-use them.
Apologies if there are any errors in my formatting and such.
The issue is when I try to pass the vectors as constructors to BouncingBallEffect it gives the following error:
[File-Path]\sketch_jul20b\sketch_jul20b.ino: In constructor 'BouncingBallEffect::BouncingBallEffect(size_t, size_t, byte, bool)':
sketch_jul20b:44:28: error: no matching function for call to 'Vector<double>::Vector(size_t&)'
Colours(ballCount)
^
In file included from [File-Path]\sketch_jul20b\sketch_jul20b.ino:6:0:
[File-Path]\Vector-1.2.1\src/Vector.h:24:3: note: candidate: template<unsigned int MAX_SIZE> Vector<T>::Vector(T (&)[MAX_SIZE], size_t)
Vector(T (&values)[MAX_SIZE],
^~~~~~
[File-Path]\Vector-1.2.1\src/Vector.h:24:3: note: template argument deduction/substitution failed:
[File-Path]\sketch_jul20b\sketch_jul20b.ino:44:28: note: mismatched types 'double [MAX_SIZE]' and 'size_t {aka unsigned int}'
Colours(ballCount)
^
In file included from [File-Path]\Vector-1.2.1\src/Vector.h:95:0,
from [File-Path]\sketch_jul20b\sketch_jul20b.ino:6:
[File-Path]\Vector-1.2.1\src/Vector/VectorDefinitions.h:16:1: note: candidate: Vector<T>::Vector() [with T = double]
Vector<T>::Vector()
^~~~~~~~~
[File-Path]\Vector-1.2.1\src/Vector/VectorDefinitions.h:16:1: note: candidate expects 0 arguments, 1 provided
In file included from [File-Path]\sketch_jul20b\sketch_jul20b.ino:6:0:
[File-Path]\Vector-1.2.1\src/Vector.h:19:7: note: candidate: constexpr Vector<double>::Vector(const Vector<double>&)
class Vector
^~~~~~
[File-Path]\Vector-1.2.1\src/Vector.h:19:7: note: no known conversion for argument 1 from 'size_t {aka unsigned int}' to 'const Vector<double>&'
[File-Path]\Vector-1.2.1\src/Vector.h:19:7: note: candidate: constexpr Vector<double>::Vector(Vector<double>&&)
[File-Path]\Vector-1.2.1\src/Vector.h:19:7: note: no known conversion for argument 1 from 'size_t {aka unsigned int}' to 'Vector<double>&&'
sketch_jul20b:44:28: error: no matching function for call to 'Vector<double>::Vector(size_t&)'
Colours(ballCount)
^
In file included from [File-Path]\sketch_jul20b\sketch_jul20b.ino:6:0:
[File-Path]\Vector-1.2.1\src/Vector.h:24:3: note: candidate: template<unsigned int MAX_SIZE> Vector<T>::Vector(T (&)[MAX_SIZE], size_t)
Vector(T (&values)[MAX_SIZE],
^~~~~~
[File-Path]\Vector-1.2.1\src/Vector.h:24:3: note: template argument deduction/substitution failed:
[File-Path]\sketch_jul20b\sketch_jul20b.ino:44:28: note: mismatched types 'double [MAX_SIZE]' and 'size_t {aka unsigned int}'
Colours(ballCount)
^
In file included from [File-Path]\Vector-1.2.1\src/Vector.h:95:0,
from [File-Path]\sketch_jul20b\sketch_jul20b.ino:6:
[File-Path]\Vector-1.2.1\src/Vector/VectorDefinitions.h:16:1: note: candidate: Vector<T>::Vector() [with T = double]
Vector<T>::Vector()
^~~~~~~~~
[File-Path]\Vector-1.2.1\src/Vector/VectorDefinitions.h:16:1: note: candidate expects 0 arguments, 1 provided
In file included from [File-Path]\sketch_jul20b\sketch_jul20b.ino:6:0:
[File-Path]\Vector-1.2.1\src/Vector.h:19:7: note: candidate: constexpr Vector<double>::Vector(const Vector<double>&)
class Vector
^~~~~~
[File-Path]\Vector-1.2.1\src/Vector.h:19:7: note: no known conversion for argument 1 from 'size_t {aka unsigned int}' to 'const Vector<double>&'
[File-Path]\Vector-1.2.1\src/Vector.h:19:7: note: candidate: constexpr Vector<double>::Vector(Vector<double>&&)
[File-Path]\Vector-1.2.1\src/Vector.h:19:7: note: no known conversion for argument 1 from 'size_t {aka unsigned int}' to 'Vector<double>&&'
sketch_jul20b:44:28: error: no matching function for call to 'Vector<double>::Vector(size_t&)'
Colours(ballCount)
^
In file included from [File-Path]\sketch_jul20b\sketch_jul20b.ino:6:0:
[File-Path]\Vector-1.2.1\src/Vector.h:24:3: note: candidate: template<unsigned int MAX_SIZE> Vector<T>::Vector(T (&)[MAX_SIZE], size_t)
Vector(T (&values)[MAX_SIZE],
^~~~~~
[File-Path]\Vector-1.2.1\src/Vector.h:24:3: note: template argument deduction/substitution failed:
[File-Path]\sketch_jul20b\sketch_jul20b.ino:44:28: note: mismatched types 'double [MAX_SIZE]' and 'size_t {aka unsigned int}'
Colours(ballCount)
^
In file included from [File-Path]\Vector-1.2.1\src/Vector.h:95:0,
from [File-Path]\sketch_jul20b\sketch_jul20b.ino:6:
[File-Path]\Vector-1.2.1\src/Vector/VectorDefinitions.h:16:1: note: candidate: Vector<T>::Vector() [with T = double]
Vector<T>::Vector()
^~~~~~~~~
[File-Path]\Vector-1.2.1\src/Vector/VectorDefinitions.h:16:1: note: candidate expects 0 arguments, 1 provided
In file included from [File-Path]\sketch_jul20b\sketch_jul20b.ino:6:0:
[File-Path]\Vector-1.2.1\src/Vector.h:19:7: note: candidate: constexpr Vector<double>::Vector(const Vector<double>&)
class Vector
^~~~~~
[File-Path]\Vector-1.2.1\src/Vector.h:19:7: note: no known conversion for argument 1 from 'size_t {aka unsigned int}' to 'const Vector<double>&'
[File-Path]\Vector-1.2.1\src/Vector.h:19:7: note: candidate: constexpr Vector<double>::Vector(Vector<double>&&)
[File-Path]\Vector-1.2.1\src/Vector.h:19:7: note: no known conversion for argument 1 from 'size_t {aka unsigned int}' to 'Vector<double>&&'
sketch_jul20b:44:28: error: no matching function for call to 'Vector<double>::Vector(size_t&)'
Colours(ballCount)
^
In file included from [File-Path]\sketch_jul20b\sketch_jul20b.ino:6:0:
[File-Path]\Vector-1.2.1\src/Vector.h:24:3: note: candidate: template<unsigned int MAX_SIZE> Vector<T>::Vector(T (&)[MAX_SIZE], size_t)
Vector(T (&values)[MAX_SIZE],
^~~~~~
[File-Path]\Vector-1.2.1\src/Vector.h:24:3: note: template argument deduction/substitution failed:
[File-Path]\sketch_jul20b\sketch_jul20b.ino:44:28: note: mismatched types 'double [MAX_SIZE]' and 'size_t {aka unsigned int}'
Colours(ballCount)
^
In file included from [File-Path]\Vector-1.2.1\src/Vector.h:95:0,
from [File-Path]\sketch_jul20b\sketch_jul20b.ino:6:
[File-Path]\Vector-1.2.1\src/Vector/VectorDefinitions.h:16:1: note: candidate: Vector<T>::Vector() [with T = double]
Vector<T>::Vector()
^~~~~~~~~
[File-Path]\Vector-1.2.1\src/Vector/VectorDefinitions.h:16:1: note: candidate expects 0 arguments, 1 provided
In file included from [File-Path]\sketch_jul20b\sketch_jul20b.ino:6:0:
[File-Path]\Vector-1.2.1\src/Vector.h:19:7: note: candidate: constexpr Vector<double>::Vector(const Vector<double>&)
class Vector
^~~~~~
[File-Path]\Vector-1.2.1\src/Vector.h:19:7: note: no known conversion for argument 1 from 'size_t {aka unsigned int}' to 'const Vector<double>&'
[File-Path]\Vector-1.2.1\src/Vector.h:19:7: note: candidate: constexpr Vector<double>::Vector(Vector<double>&&)
[File-Path]\Vector-1.2.1\src/Vector.h:19:7: note: no known conversion for argument 1 from 'size_t {aka unsigned int}' to 'Vector<double>&&'
sketch_jul20b:44:28: error: no matching function for call to 'Vector<CRGB>::Vector(size_t&)'
Colours(ballCount)
^
In file included from [File-Path]\sketch_jul20b\sketch_jul20b.ino:6:0:
[File-Path]\Vector-1.2.1\src/Vector.h:24:3: note: candidate: template<unsigned int MAX_SIZE> Vector<T>::Vector(T (&)[MAX_SIZE], size_t)
Vector(T (&values)[MAX_SIZE],
^~~~~~
[File-Path]\Vector-1.2.1\src/Vector.h:24:3: note: template argument deduction/substitution failed:
[File-Path]\sketch_jul20b\sketch_jul20b.ino:44:28: note: mismatched types 'CRGB [MAX_SIZE]' and 'size_t {aka unsigned int}'
Colours(ballCount)
^
In file included from [File-Path]\Vector-1.2.1\src/Vector.h:95:0,
from [File-Path]\sketch_jul20b\sketch_jul20b.ino:6:
[File-Path]\Vector-1.2.1\src/Vector/VectorDefinitions.h:16:1: note: candidate: Vector<T>::Vector() [with T = CRGB]
Vector<T>::Vector()
^~~~~~~~~
[File-Path]\Vector-1.2.1\src/Vector/VectorDefinitions.h:16:1: note: candidate expects 0 arguments, 1 provided
In file included from [File-Path]\sketch_jul20b\sketch_jul20b.ino:6:0:
[File-Path]\Vector-1.2.1\src/Vector.h:19:7: note: candidate: constexpr Vector<CRGB>::Vector(const Vector<CRGB>&)
class Vector
^~~~~~
[File-Path]\Vector-1.2.1\src/Vector.h:19:7: note: no known conversion for argument 1 from 'size_t {aka unsigned int}' to 'const Vector<CRGB>&'
[File-Path]\Vector-1.2.1\src/Vector.h:19:7: note: candidate: constexpr Vector<CRGB>::Vector(Vector<CRGB>&&)
[File-Path]\Vector-1.2.1\src/Vector.h:19:7: note: no known conversion for argument 1 from 'size_t {aka unsigned int}' to 'Vector<CRGB>&&'
My code is here:
#include <Arduino.h>
#define FASTLED_INTERNAL
#include <FastLED.h>
using namespace std;
#include <Vector.h>
static const CRGB ballColours [] = {
CRGB::Green,
CRGB::Red,
CRGB::Blue,
CRGB::Orange,
CRGB::Indigo
};
class BouncingBallEffect {
private:
double InitialBallSpeed(double height) const {
return sqrt(-2 * Gravity * height); // Because MATH!
}
size_t _cLength;
size_t _cBalls;
byte _fadeRate;
bool _bMirrored;
const double Gravity = -9.81; // Because PHYSICS!
const double StartHeight = 1; // Drop balls from max height initially
Vector<double> ClockTimeAtLastBounce, Height, BallSpeed, Dampening;
Vector<CRGB> Colours;
public:
// BouncingBallEffect
//
// Caller specs strip length, number of balls, persistence level (255 is least), and whether the
// balls should be drawn mirrored from each side.
BouncingBallEffect(size_t cLength, size_t ballCount = 3, byte fade = 0, bool bMirrored = false)
: _cLength(cLength - 1),
_cBalls(ballCount),
_fadeRate(fade),
_bMirrored(bMirrored),
ClockTimeAtLastBounce(ballCount),
Height(ballCount),
BallSpeed(ballCount),
Dampening(ballCount),
Colours(ballCount)
{
for (size_t i = 0; i < ballCount; i++) {
Height[i] = StartHeight; // Current Ball Height
Dampening[i] = 0.90 - i / pow(_cBalls, 2); // Bounciness of this ball
BallSpeed[i] = InitialBallSpeed(Height[i]); // Don't dampen initial launch
}
}
};
Any help anyone can offer would be much appreciated, thank you.
1 answers
solution1
0 ACCPTED 2021-07-20 19:00:44
Arduino's Vector library ( https://github.com/janelia-arduino/Vector ) accepts a statically allocated array at construction time, unlike std::vector which you can pass a size_t into.
template <typename T>
class Vector
{
public:
Vector();
template <size_t MAX_SIZE>
Vector(T (&values)[MAX_SIZE],
size_t size=0);
// ...
};
You will need to pass an array instead of a size_t , or use a different data structure during these member initializers:
// ...
ClockTimeAtLastBounce(ballCount),
Height(ballCount),
BallSpeed(ballCount),
Dampening(ballCount),
Colours(ballCount)
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