Panda3D
Public Member Functions | Static Public Member Functions

MeshDrawer Class Reference

Mesh drawer creates a single geom object that can be shaped with different draw commands. More...

Inheritance diagram for MeshDrawer:
TypedObject MemoryBase

List of all members.

Public Member Functions

 MeshDrawer ()
 Creates the MeshDrawer low level system.
 begin (NodePath camera, NodePath render)
 Pass the current camera node and the root node.
 billboard (Vec3 pos, Vec4 frame, float size, Vec4 color)
 Draws a billboard - particle with no rotation.
 blendedParticle (Vec3 pos, Vec4 frame1, Vec4 frame2, float blend, float size, Vec4 color, float rotation)
 Works just like particle but accepts 2 frames and a blend (from 0 to 1) component between them Frame contains u,v,u-size,v-size quadruple.
 crossSegment (Vec3 start, Vec3 stop, Vec4 frame, float thickness, Vec4 color)
 Draws a segment a line with a thickness.
 end ()
 Finish the drawing and clearing off the remaining vertexes.
 explosion (Vec3 pos, Vec4 frame, float size, Vec4 color, int seed, int number, float distance)
 Draws number of particles in a sphere like emitter.
 geometry (NodePath node)
 Draws the geometry that is inside this node path into the MeshDrawer object.
int getBudget ()
 Gets the total triangle budget of the drawer.
NodePath getRoot ()
 Returns the root NodePath.
TypeHandle getType ()
int getTypeIndex ()
 Returns the internal index number associated with this object's TypeHandle, a unique number for each different type.
bool isExactType (TypeHandle handle)
 Returns true if the current object is the indicated type exactly.
bool isOfType (TypeHandle handle)
 Returns true if the current object is or derives from the indicated type.
 linkSegment (Vec3 pos, Vec4 frame, float thickness, Vec4 color)
 Stars or continues linked segment.
 linkSegmentEnd (Vec4 frame, Vec4 color)
 Finish drawing linked segments, needs at least two calls to link_segment before it can end the linked segment.
 particle (Vec3 pos, Vec4 frame, float size, Vec4 color, float rotation)
 Draws a particle that is sort of like a bill board but has an extra rotation component.
 segment (Vec3 start, Vec3 stop, Vec4 frame, float thickness, Vec4 color)
 Draws a segment a line with a thickness.
 setBudget (int budget)
 Sets the total triangle budget of the drawer.
 stream (Vec3 start, Vec3 stop, Vec4 frame, float size, Vec4 color, int number, float offset)
 Draws a number of particles in a big line with a shift dictated by the offset.
 tri (Vec3 v1, Vec4 c1, Vec2 uv1, Vec3 v2, Vec4 c2, Vec2 uv2, Vec3 v3, Vec4 c3, Vec2 uv3)
 Draws a triangle with the given parameters.
 unevenSegment (Vec3 start, Vec3 stop, Vec4 frame, float thickness_start, Vec4 color_start, float thickness_stop, Vec4 color_stop)
 Draws a segment a line with different thickness and color on both sides.

Static Public Member Functions

static TypeHandle getClassType ()

Detailed Description

Mesh drawer creates a single geom object that can be shaped with different draw commands.

This is an efficient way to render bunch of billboards, particles, fast changing triangles. Its implemented by recycling same geom over and over again. Max budget specifies how many triangles are allowed. Some uses of this class can be : particle system, radar icons, health bars, 2d icons, 2d ui, bullets, missile trails. Any that can be drawn with triangles can be drawn with this class. At the low level this uses the GeomVertexRewriter's. The internal geom consists of vertex, normal, uv and color channels.


Constructor & Destructor Documentation

Creates the MeshDrawer low level system.


Member Function Documentation

begin ( NodePath  camera,
NodePath  render 
)

Pass the current camera node and the root node.

Passing the camera is required to generate bill boards that face it.

billboard ( Vec3  pos,
Vec4  frame,
float  size,
Vec4  color 
)

Draws a billboard - particle with no rotation.

Billboards always face the camera. Frame contains u,v,u-size,v-size quadruple.

blendedParticle ( Vec3  pos,
Vec4  frame1,
Vec4  frame2,
float  blend,
float  size,
Vec4  color,
float  rotation 
)

Works just like particle but accepts 2 frames and a blend (from 0 to 1) component between them Frame contains u,v,u-size,v-size quadruple.

crossSegment ( Vec3  start,
Vec3  stop,
Vec4  frame,
float  thickness,
Vec4  color 
)

Draws a segment a line with a thickness.

This segment does not use the bill boarding behavior and instead draws 2 planes in a cross. Stars at start and ends at stop. Frame contains u,v,u-size,v-size quadruple.

end ( )

Finish the drawing and clearing off the remaining vertexes.

explosion ( Vec3  pos,
Vec4  frame,
float  size,
Vec4  color,
int  seed,
int  number,
float  distance 
)

Draws number of particles in a sphere like emitter.

Frame contains u,v,u-size,v-size quadruple.

geometry ( NodePath  node)

Draws the geometry that is inside this node path into the MeshDrawer object.

This performs a similar functions as RigidBodyCombiner but for very dynamic situations that share the same texture like physcal chunks of explosions. It can be a little slow

int getBudget ( )

Gets the total triangle budget of the drawer.

static TypeHandle getClassType ( ) [static]

Reimplemented from TypedObject.

NodePath getRoot ( )

Returns the root NodePath.

You should use this node to reparent mesh drawer onto the scene might also want to disable depth draw or enable transparency.

TypeHandle getType ( ) [inherited]

Reimplemented in AnimChannelBase.

int getTypeIndex ( ) [inherited]

Returns the internal index number associated with this object's TypeHandle, a unique number for each different type.

This is equivalent to get_type().get_index().

bool isExactType ( TypeHandle  handle) [inherited]

Returns true if the current object is the indicated type exactly.

bool isOfType ( TypeHandle  handle) [inherited]

Returns true if the current object is or derives from the indicated type.

linkSegment ( Vec3  pos,
Vec4  frame,
float  thickness,
Vec4  color 
)

Stars or continues linked segment.

Control position, frame, thickness and color with parameters. Frame contains u,v,u-size,v-size quadruple.

linkSegmentEnd ( Vec4  frame,
Vec4  color 
)

Finish drawing linked segments, needs at least two calls to link_segment before it can end the linked segment.

Frame contains u,v,u-size,v-size quadruple.

particle ( Vec3  pos,
Vec4  frame,
float  size,
Vec4  color,
float  rotation 
)

Draws a particle that is sort of like a bill board but has an extra rotation component.

Frame contains u,v,u-size,v-size quadruple.

segment ( Vec3  start,
Vec3  stop,
Vec4  frame,
float  thickness,
Vec4  color 
)

Draws a segment a line with a thickness.

That has billboarding effect. Frame contains u,v,u-size,v-size quadruple.

setBudget ( int  budget)

Sets the total triangle budget of the drawer.

This will not be exceeded. Don't set some thing too large because it will be slow

stream ( Vec3  start,
Vec3  stop,
Vec4  frame,
float  size,
Vec4  color,
int  number,
float  offset 
)

Draws a number of particles in a big line with a shift dictated by the offset.

Frame contains u,v,u-size,v-size quadruple.

tri ( Vec3  v1,
Vec4  c1,
Vec2  uv1,
Vec3  v2,
Vec4  c2,
Vec2  uv2,
Vec3  v3,
Vec4  c3,
Vec2  uv3 
)

Draws a triangle with the given parameters.

unevenSegment ( Vec3  start,
Vec3  stop,
Vec4  frame,
float  thickness_start,
Vec4  color_start,
float  thickness_stop,
Vec4  color_stop 
)

Draws a segment a line with different thickness and color on both sides.

Stars at start and ends at stop. Frame contains u,v,u-size,v-size quadruple.

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