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correction of the image distance field generation

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This commit is contained in:
Edouard DUPIN 2012-09-06 18:39:06 +02:00
parent bfba3999b5
commit b3f1a97a28
2 changed files with 17 additions and 7 deletions
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14
draw/Image.cpp
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@ -306,12 +306,14 @@ void draw::Image::DistanceField(Vector2D<int32_t> pos, Vector2D<int32_t> size)
{
Grid grid1(size);
Grid grid2(size);
grid1.SetOutsideVal(50);
grid2.SetOutsideVal(50);
grid1.SetOutsideVal(500000);
grid2.SetOutsideVal(500000);
grid1.SetErrorVal(0);
grid2.SetErrorVal(500000);
Vector2D<int32_t> tmpPos;
for(tmpPos.y=0 ; tmpPos.y<size.x ; tmpPos.y++ ) {
for(tmpPos.x=0 ; tmpPos.x<size.y ; tmpPos.x++ ) {
for(tmpPos.y=0 ; tmpPos.y<size.y ; tmpPos.y++ ) {
for(tmpPos.x=0 ; tmpPos.x<size.x ; tmpPos.x++ ) {
draw::Color tmpColor = Get(pos+tmpPos);
// Points inside get marked with a x/y of zero.
// Points outside get marked with an infinitely large distance.
@ -329,8 +331,8 @@ void draw::Image::DistanceField(Vector2D<int32_t> pos, Vector2D<int32_t> size)
GenerateSDF( grid1 );
GenerateSDF( grid2 );
for(tmpPos.y=0 ; tmpPos.y<size.x ; tmpPos.y++ ) {
for(tmpPos.x=0 ; tmpPos.x<size.y ; tmpPos.x++ ) {
for(tmpPos.y=0 ; tmpPos.y<size.y ; tmpPos.y++ ) {
for(tmpPos.x=0 ; tmpPos.x<size.x ; tmpPos.x++ ) {
Vector2D<int32_t> elem1 = grid1.Get(tmpPos);
Vector2D<int32_t> elem2 = grid2.Get(tmpPos);
// Calculate the actual distance from the x/y

10
draw/Image.h
View File

@ -50,10 +50,12 @@ class Grid
Vector2D<int32_t> m_size;
etk::Vector<Vector2D<int32_t> > m_data;
int32_t m_outsideVal;
int32_t m_errorVal;
Grid(Vector2D<int32_t> size)
{
m_size = size;
m_outsideVal = 20;
m_errorVal = 0;
// basic element :
Vector2D<int32_t> tmpPoint(0,0);
// preallocate data with a basic bg elements :
@ -64,6 +66,10 @@ class Grid
{
m_outsideVal = newVal;
}
void SetErrorVal(int32_t newVal)
{
m_errorVal = newVal;
}
void SetInide(Vector2D<int32_t> pos)
{
if( pos.x>=0 && pos.x<m_size.x
@ -88,7 +94,7 @@ class Grid
&& pos.y>0 && pos.y<m_size.y) {
return m_data[pos.x+pos.y*m_size.x];
}
return Vector2D<int32_t>(0,0);
return Vector2D<int32_t>(m_errorVal,m_errorVal);
};
void Set(Vector2D<int32_t> pos, Vector2D<int32_t> val)
@ -238,6 +244,8 @@ namespace draw
// generate the distant field from the alpha value of the Image
void DistanceField(void);
void DistanceField(Vector2D<int32_t> pos, Vector2D<int32_t> size);
void SaveFile(const char * file) {};
private: