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Go back to using pointers instead of vectors.

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No need to incur that performance overhead.
This commit is contained in:
Bert Peters
2017-11-23 16:18:10 +01:00
parent 44f467c81c
commit 9de25b0f37
2 changed files with 11 additions and 11 deletions
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14
src/FlatLayerVisualisation.cpp
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@@ -22,15 +22,15 @@ static inline void computeColor(float intensity, float limit, float* destination
FlatLayerVisualisation::FlatLayerVisualisation(const fmri::LayerData &layer) :
faceCount(layer.numEntries() * 4),
vertexBuffer(faceCount * 3),
colorBuffer(faceCount * 3),
indexBuffer(faceCount * 3)
vertexBuffer(new float[faceCount * 3]),
colorBuffer(new float[faceCount * 3]),
indexBuffer(new int[faceCount * 3])
{
auto& shape = layer.shape();
CHECK_EQ(shape.size(), 2) << "layer should be flat!" << endl;
CHECK_EQ(shape[0], 1) << "Only single images supported." << endl;
const int limit = static_cast<const int>(layer.numEntries());
const auto limit = (int) layer.numEntries();
auto data = layer.data();
const auto [minElem, maxElem] = minmax_element(data, data + limit);
@@ -84,9 +84,9 @@ void FlatLayerVisualisation::render()
glEnableClientState(GL_VERTEX_ARRAY);
glEnableClientState(GL_COLOR_ARRAY);
glVertexPointer(3, GL_FLOAT, 0, vertexBuffer.data());
glColorPointer(3, GL_FLOAT, 0, colorBuffer.data());
glDrawElements(GL_TRIANGLES, faceCount * 3, GL_UNSIGNED_INT, indexBuffer.data());
glVertexPointer(3, GL_FLOAT, 0, vertexBuffer.get());
glColorPointer(3, GL_FLOAT, 0, colorBuffer.get());
glDrawElements(GL_TRIANGLES, faceCount * 3, GL_UNSIGNED_INT, indexBuffer.get());
glDisable(GL_VERTEX_ARRAY);
glDisable(GL_COLOR_ARRAY);

8
src/FlatLayerVisualisation.hpp
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@@ -1,6 +1,6 @@
#pragma once
#include <vector>
#include <memory>
#include "LayerData.hpp"
#include "LayerVisualisation.hpp"
@@ -16,8 +16,8 @@ namespace fmri
private:
std::size_t faceCount;
std::vector<float> vertexBuffer;
std::vector<float> colorBuffer;
std::vector<int> indexBuffer;
std::unique_ptr<float[]> vertexBuffer;
std::unique_ptr<float[]> colorBuffer;
std::unique_ptr<int[]> indexBuffer;
};
}