ilikecats/stk-code_catmod
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Improved stars effect with fade in and fade out

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git-svn-id: svn+ssh://svn.code.sf.net/p/supertuxkart/code/main/trunk@4359 178a84e3-b1eb-0310-8ba1-8eac791a3b58
This commit is contained in:
auria 2009-12-28 20:06:41 +00:00
parent 5e5f91247b
commit 7bc47f2ffd
2 changed files with 38 additions and 4 deletions
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41
src/graphics/stars.cpp
View File

@ -43,6 +43,7 @@ Stars::Stars(scene::IAnimatedMeshSceneNode* parentKart)
texture,
parentKart);
star_material->setMaterialProperties(&(billboard->getMaterial(0)));
//billboard->getMaterial(0).MaterialType = video::EMT_TRANSPARENT_ALPHA_CHANNEL;
billboard->setMaterialTexture(0, star_material->getTexture());
billboard->setVisible(false);
@ -73,11 +74,13 @@ void Stars::showFor(float time)
{
m_enabled = true;
m_remaining_time = time;
m_fade_in_time = 1.0f;
const int nodeAmount = m_nodes.size();
for (int n=0; n<nodeAmount; n++)
{
m_nodes[n]->setVisible(true);
((scene::IBillboardSceneNode*)m_nodes[n])->setSize( core::dimension2d< f32 >(0.01f, 0.01f) );
}
// set stars initial position
@ -115,10 +118,40 @@ void Stars::update(float delta_t)
// keep angle in range [0, 1[
angle -= (int)angle;
float radius = RADIUS;
// manage "fade-in"
if (m_fade_in_time > 0.0f)
{
//m_nodes[n]->getMaterial(0).AmbientColor.setAlpha((1.0f - m_fade_in_time)*255.0f);
//m_nodes[n]->getMaterial(0).DiffuseColor.setAlpha((1.0f - m_fade_in_time)*255.0f);
float fade = (1.0f - m_fade_in_time);
((scene::IBillboardSceneNode*)m_nodes[n])->setSize(
core::dimension2d< f32 >(fade*STAR_SIZE, fade*STAR_SIZE) );
radius *= fade;
}
// manage "fade-out"
else if (m_remaining_time < 1.0f)
{
//m_nodes[n]->getMaterial(0).AmbientColor.setAlpha(m_remaining_time*255.0f);
//m_nodes[n]->getMaterial(0).DiffuseColor.setAlpha(m_remaining_time*255.0f);
radius *= m_remaining_time;
((scene::IBillboardSceneNode*)m_nodes[n])->setSize( core::dimension2d< f32 >(m_remaining_time*STAR_SIZE,
m_remaining_time*STAR_SIZE) );
}
// set position
m_nodes[n]->setPosition(m_center + core::vector3df( std::cos(angle*M_PI*2.0f)*RADIUS,
0.0f,
std::sin(angle*M_PI*2.0f)*RADIUS));
}
m_nodes[n]->setPosition(m_center + core::vector3df( std::cos(angle*M_PI*2.0f)*radius,
0.0f,
std::sin(angle*M_PI*2.0f)*radius));
} // end for
if (m_fade_in_time > 0.0f) m_fade_in_time -= delta_t;
}

1
src/graphics/stars.hpp
View File

@ -41,6 +41,7 @@ private:
/** Whether stars are currently enabled */
bool m_enabled;
float m_fade_in_time;
float m_remaining_time;
public: