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added do_billboard_*

This commit is contained in:
David Rose 2001-05-25 01:54:18 +00:00
parent 498be8d1c5
commit 408ec1754c
2 changed files with 83 additions and 0 deletions
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80
panda/src/sgmanip/nodePath.cxx
View File

@ -2476,6 +2476,86 @@ get_two_sided() const {
return false;
}
////////////////////////////////////////////////////////////////////
// Function: NodePath::do_billboard_axis
// Access: Public
// Description: Performs a billboard-type rotate to the indicated
// camera node, one time only, and leaves the object
// rotated. This is similar in principle to heads_up().
////////////////////////////////////////////////////////////////////
void NodePath::
do_billboard_axis(const NodePath &camera) {
nassertv(has_arcs());
LPoint3f pos = get_pos();
NodePath parent(*this);
parent.shorten(1);
LMatrix4f rel_mat = camera.get_mat(parent);
LVector3f up = LVector3f::up();
LVector3f rel_pos = -rel_mat.get_row3(3);
LMatrix4f mat;
::heads_up(mat, rel_pos, up);
mat.set_row(3, pos);
set_mat(mat);
}
////////////////////////////////////////////////////////////////////
// Function: NodePath::do_billboard_point_eye
// Access: Public
// Description: Performs a billboard-type rotate to the indicated
// camera node, one time only, and leaves the object
// rotated. This is similar in principle to look_at(),
// although the point_eye billboard effect cannot be
// achieved using the ordinary look_at() call.
////////////////////////////////////////////////////////////////////
void NodePath::
do_billboard_point_eye(const NodePath &camera) {
nassertv(has_arcs());
LPoint3f pos = get_pos();
NodePath parent(*this);
parent.shorten(1);
LMatrix4f rel_mat = camera.get_mat(parent);
LVector3f up = LVector3f::up() * rel_mat;
LVector3f rel_pos = LVector3f::forward() * rel_mat;
LMatrix4f mat;
::look_at(mat, rel_pos, up);
mat.set_row(3, pos);
set_mat(mat);
}
////////////////////////////////////////////////////////////////////
// Function: NodePath::do_billboard_point_world
// Access: Public
// Description: Performs a billboard-type rotate to the indicated
// camera node, one time only, and leaves the object
// rotated. This is similar in principle to look_at().
////////////////////////////////////////////////////////////////////
void NodePath::
do_billboard_point_world(const NodePath &camera) {
nassertv(has_arcs());
LPoint3f pos = get_pos();
NodePath parent(*this);
parent.shorten(1);
LMatrix4f rel_mat = camera.get_mat(parent);
LVector3f up = LVector3f::up();
LVector3f rel_pos = -rel_mat.get_row3(3);
LMatrix4f mat;
::look_at(mat, rel_pos, up);
mat.set_row(3, pos);
set_mat(mat);
}
////////////////////////////////////////////////////////////////////
// Function: NodePath::set_transparency
// Access: Public

3
panda/src/sgmanip/nodePath.h
View File

@ -448,6 +448,9 @@ PUBLISHED:
INLINE bool has_two_sided() const;
bool get_two_sided() const;
void do_billboard_axis(const NodePath &camera);
void do_billboard_point_eye(const NodePath &camera);
void do_billboard_point_world(const NodePath &camera);
INLINE void set_billboard_axis();
INLINE void set_billboard_point_eye();
INLINE void set_billboard_point_world();