ilikecats/stk-code_catmod
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Fixed 'disturbed' slipstream graphics (sharp bend).

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Also removed additional turn of every 2nd ring in the
cylinder, which made it much harder to get the texture
coordinates right.


git-svn-id: svn+ssh://svn.code.sf.net/p/supertuxkart/code/main/trunk@5397 178a84e3-b1eb-0310-8ba1-8eac791a3b58
This commit is contained in:
hikerstk 2010-05-06 23:28:58 +00:00
parent ad6afbe036
commit 0b12fb45ae
1 changed files with 17 additions and 4 deletions
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21
src/graphics/slip_stream.cpp
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@ -42,7 +42,7 @@ SlipStream::SlipStream(Kart* kart) : MovingTexture(0, 0), m_kart(kart)
//m.MaterialType = video::EMT_TRANSPARENT_VERTEX_ALPHA;
//m.MaterialType = video::EMT_TRANSPARENT_ALPHA_CHANNEL;
m.MaterialType = video::EMT_TRANSPARENT_ADD_COLOR;
createMesh(m);
m_node = irr_driver->addMesh(m_mesh);
//m_node->setParent(m_kart->getNode());
@ -76,7 +76,20 @@ void SlipStream::createMesh(const video::SMaterial &material)
// The distance of each of the circle from the kart. The number of
// entries in this array must be the same as the number of non-zero
// entries in the radius[] array above. No 'end of list' entry required.
float distance[] = {2.0f, 6.0f, 14.0f };
// Note also that in order to avoid a 'bent' in the texture the
// difference between the distances must be linearly correlated to the
// difference in the corresponding radius, see the following sideview:
// +
// + |
// + | | three radius
// | | |
// +----+----+
// 0 1 2
// distances
// (radius1-radius0)/(distance1-distance0) = (radius2-radius1)/(distnace2-distance0)
// This way the line connecting the upper "+" is a straight line,
// and so the 3d cone shape will not be disturbed.
float distance[] = {2.0f, 6.0f, 10.0f };
// The alpha values for the rings, no 'end of list' entry required.
int alphas[] = {0, 255, 0};
@ -107,8 +120,8 @@ void SlipStream::createMesh(const video::SMaterial &material)
video::S3DVertex v;
// Offset every 2nd circle by one half segment to increase
// the number of planes so it looks better.
v.Pos.X = sin((i+(j%2)*0.5f)*f)*radius[j];
v.Pos.Y = -cos((i+(j%2)*0.5f)*f)*radius[j];
v.Pos.X = sin(i*f)*radius[j];
v.Pos.Y = -cos(i*f)*radius[j];
v.Pos.Z = distance[j];
v.Color = video::SColor(alphas[j], alphas[j], alphas[j], alphas[j]);
v.TCoords.X = curr_distance/m_length;