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implemented fire pit illumination where camera's position relative to the light and avatar is considered to apply illumination

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This commit is contained in:
Asad M. Zaman 2004-09-21 00:45:54 +00:00
parent bc8f23db4b
commit b18ddfb9c5
1 changed files with 14 additions and 14 deletions
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28
panda/src/pgraph/polylightEffect.cxx
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@ -166,34 +166,35 @@ do_poly_light(const SceneSetup *scene, const CullTraverserData *data, const Tran
// Calculate the distance of the node from the light
//dist = light_iter->second->get_distance(data->_node_path.get_node_path());
const NodePath lightnp = *light_iter;
LPoint3f avatar_position = data->_node_path.get_node_path().get_relative_point(lightnp, light->get_pos());
LPoint3f relative_point = data->_node_path.get_node_path().get_relative_point(lightnp, light->get_pos());
if (_effect_center[2]) {
dist = (avatar_position - _effect_center).length(); // this counts height difference
dist = (relative_point - _effect_center).length(); // this counts height difference
} else {
// get distance as if the light is at the same height of player
LVector2f xz(avatar_position[0], avatar_position[1]);
LVector2f xz(relative_point[0], relative_point[1]);
dist = xz.length(); // this does not count height difference
}
if (dist <= light_radius) { // If node is in range of this light
/*
// as to Schuyler's suggestion, lets do some vector processing relative to camera
LPoint3f light_position = light->get_pos();
LPoint3f camera_position = camera.get_relative_point(lightnp, light->get_pos());
LVector3f light_camera = camera_position - LPoint3f(0,0,0);
LVector3f light_avatar = avatar_position - LPoint3f(0,0,0);
//LPoint3f camera_position = camera.get_relative_point(lightnp, light->get_pos());
LPoint3f camera_position = lightnp.get_relative_point(camera, LPoint3f(0,0,0));
LPoint3f avatar_position = lightnp.get_relative_point(data->_node_path.get_node_path(), LPoint3f(0,0,0));
LVector3f light_camera = camera_position - light_position;
LVector3f light_avatar = avatar_position - light_position;
light_camera.normalize();
light_avatar.normalize();
float intensity = light_camera.dot(light_avatar);
if (polylight_info) {
pgraph_cat.debug() << "light's position = " << light->get_pos() << endl;
pgraph_cat.debug() << "light position = " << light_position << endl;
pgraph_cat.debug() << "relative avatar position = " << avatar_position << endl;
pgraph_cat.debug() << "relative camera position = " << camera_position << endl;
pgraph_cat.debug() << "light_camera " << light_camera << endl;
pgraph_cat.debug() << "light_avatar " << light_avatar << endl;
pgraph_cat.info() << "light_camera dot light_avatar = " << intensity << endl;
pgraph_cat.debug() << "light->camera " << light_camera << endl;
pgraph_cat.debug() << "light->avatar " << light_avatar << endl;
pgraph_cat.debug() << "light->camera.light->avatar = " << intensity << endl;
pgraph_cat.debug() << "effect center = " << _effect_center << endl;
//pgraph_cat.debug() << "close to this light = " << light->get_name() << endl;
pgraph_cat.debug() << "dist = " << dist << ";radius = " << light_radius << endl;
@ -202,9 +203,8 @@ do_poly_light(const SceneSetup *scene, const CullTraverserData *data, const Tran
// map -1 to 1 into 0 to 1; and flip it
intensity = 1.0 - ((intensity + 1.0) * 0.5);
if (polylight_info) {
pgraph_cat.info() << "intensity = " << intensity << endl;
pgraph_cat.debug() << "remapped intensity = " << intensity << endl;
}
*/
PolylightNode::Attenuation_Type light_attenuation = light->get_attenuation();
Colorf light_color;
@ -244,7 +244,7 @@ do_poly_light(const SceneSetup *scene, const CullTraverserData *data, const Tran
light_scale = 1.0;
}
//light_scale *= intensity;
light_scale *= intensity;
if (min_dist > dist) {
min_dist = dist;