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More skidlines graphics tweaks

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git-svn-id: svn+ssh://svn.code.sf.net/p/supertuxkart/code/main/trunk@14245 178a84e3-b1eb-0310-8ba1-8eac791a3b58
This commit is contained in:
auria 2013-10-12 22:58:01 +00:00
parent 55e0e4c074
commit 3ac48aa6b8
1 changed files with 13 additions and 5 deletions
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18
src/graphics/skid_marks.cpp
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@ -268,10 +268,17 @@ void SkidMarks::SkidMarkQuads::add(const Vec3 &left,
video::S3DVertex v;
v.Color = m_start_color;
if (n == 0)
v.Color.setAlpha(0.0f);
else
v.Color.setAlpha(m_start_alpha);
v.Color.setAlpha(0.0f); // initially create all vertices at alpha=0...
// then when adding a new set of vertices, make the previous 2 opaque.
// this ensures that the last two vertices are always at alpha=0,
// producing a fade-out effect
if (n > 4)
{
Vertices[n - 1].Color.setAlpha(m_start_alpha);
Vertices[n - 2].Color.setAlpha(m_start_alpha);
}
v.Pos = left.toIrrVector();
v.Pos.Y += m_z_offset;
v.Normal = core::vector3df(0, 1, 0);
@ -317,7 +324,8 @@ void SkidMarks::SkidMarkQuads::fade(float f)
a -= (a < m_fade_out ? a : (int)m_fade_out);
c.setAlpha(a);
for(unsigned int i=2; i<Vertices.size(); i++)
// the first 2 and last 2 already have alpha=0 for fade-in and fade-out
for(unsigned int i=2; i<Vertices.size() - 2; i++)
{
Vertices[i].Color.setAlpha(a);
}