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using matrix operations

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Roman Sorokin 2014-07-25 18:55:50 +03:00 • committed by Alex Zolotarev
parent ecd802af3e
commit 59c2f60ec1
1 changed files with 23 additions and 30 deletions
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53
drape_frontend/path_text_shape.cpp
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@ -11,6 +11,9 @@
#include "../base/stl_add.hpp"
#include "../base/string_utils.hpp"
#include "../base/timer.hpp"
#include "../base/matrix.hpp"
#include "../geometry/transformations.hpp"
#include "../std/algorithm.hpp"
#include "../std/vector.hpp"
@ -42,6 +45,7 @@ namespace
{
Position() {}
Position(float x, float y) : m_x(x), m_y(y){}
Position(PointF const & p) : m_x(p.x), m_y(p.y){}
float m_x;
float m_y;
@ -234,44 +238,33 @@ void PathTextHandle::GetAttributeMutation(RefPointer<AttributeBufferMutator> mut
dir = oldDir;
}
float const angle = atan2(dir.y, dir.x);
float const cosa = cosf(angle);
float const sina = sinf(angle);
float gip = sqrtf(dir.y*dir.y + dir.x*dir.x);
ASSERT_NOT_EQUAL(gip, 0.0, ("division by zero"));
float const cosa = dir.x / gip;
float const sina = dir.y / gip;
yOffset += halfHeight;
xOffset += halfWidth;
float const x1old = halfWidth + xOffset;
float const y1old = -halfHeight + yOffset;
PointF const p1old(halfWidth + xOffset, -halfHeight + yOffset);
PointF const p2old(-halfWidth + xOffset, -halfHeight + yOffset);
PointF const p3old(-halfWidth + xOffset, halfHeight + yOffset);
PointF const p4old(halfWidth + xOffset, halfHeight + yOffset);
float const x2old = -halfWidth + xOffset;
float const y2old = -halfHeight + yOffset;
math::Matrix<double, 3, 3> m = math::Rotate(math::Identity<double, 3>(), cosa, sina);
float const x3old = -halfWidth + xOffset;
float const y3old = halfHeight + yOffset;
float const x4old = halfWidth + xOffset;
float const y4old = halfHeight + yOffset;
float x1 = (x1old * cosa - y1old * sina) * m_scaleFactor + pos.x;
float y1 = (x1old * sina + y1old * cosa) * m_scaleFactor + pos.y;
float x2 = (x2old * cosa - y2old * sina) * m_scaleFactor + pos.x;
float y2 = (x2old * sina + y2old * cosa) * m_scaleFactor + pos.y;
float x3 = (x3old * cosa - y3old * sina) * m_scaleFactor + pos.x;
float y3 = (x3old * sina + y3old * cosa) * m_scaleFactor + pos.y;
float x4 = (x4old * cosa - y4old * sina) * m_scaleFactor + pos.x;
float y4 = (x4old * sina + y4old * cosa) * m_scaleFactor + pos.y;
PointF p1 = (p1old * m_scaleFactor) * m + pos;
PointF p2 = (p2old * m_scaleFactor) * m + pos;
PointF p3 = (p3old * m_scaleFactor) * m + pos;
PointF p4 = (p4old * m_scaleFactor) * m + pos;
int index = i * 6;
positions[index++] = Position(x2, y2);
positions[index++] = Position(x3, y3);
positions[index++] = Position(x1, y1);
positions[index++] = Position(p2);
positions[index++] = Position(p3);
positions[index++] = Position(p1);
positions[index++] = Position(x4, y4);
positions[index++] = Position(x1, y1);
positions[index++] = Position(x3, y3);
positions[index++] = Position(p4);
positions[index++] = Position(p1);
positions[index++] = Position(p3);
}
TOffsetNode const & node = GetOffsetNode(DirectionAttributeID);