MindMap Gallery Projections of points, lines and planes
This is a mind map about the projection of points, lines and planes, including point projection, straight line projection, plane projection, etc.
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This is a mind map about bacteria, and its main contents include: overview, morphology, types, structure, reproduction, distribution, application, and expansion. The summary is comprehensive and meticulous, suitable as review materials.
This is a mind map about plant asexual reproduction, and its main contents include: concept, spore reproduction, vegetative reproduction, tissue culture, and buds. The summary is comprehensive and meticulous, suitable as review materials.
This is a mind map about the reproductive development of animals, and its main contents include: insects, frogs, birds, sexual reproduction, and asexual reproduction. The summary is comprehensive and meticulous, suitable as review materials.
Projections of points, lines and planes
point projection
point coordinates
Projection of special points
on the projection surface
One axis is 0
There is one projection coincident with the space point, and the other two projections are on the projection axis
on the projection axis
There are two coordinate axes at 0
There are two projections coincident with itself, and the other projection is at the origin
Visibility of ghost points
Invisible projections are represented by parentheses
straight projection
General straight line: does not reflect the real length and the angle with the projection surface
special straight line
Parallel to the projection surface
straight line
horizontal line
side horizontal line
Perpendicular to the projection surface
normal vertical line
plumb line
Side vertical line
Pay attention to its projection characteristics
point on line
Continuous shadow vertical axis
Proportionality
Positional relationship between straight lines
cross
parallel
vertical
projection of plane
Plane representation method
Geometric element representation
trace representation
General position plane: the three projections are all similar figures of the original image
Special location plane
Parallel to the projection surface
front plane
level
side plane
Perpendicular to the projection surface
vertical plane
plumb surface
Side vertical surface
Pay attention to its projection characteristics
Lines and points on the plane
Auxiliary lines can be made to determine the position of points on the plane
Positional relationship between straight lines and planes
parallel
vertical
intersect
Pay attention to the ghosting problem during occlusion
Positional relationship between planes
parallel
intersect
Pay attention to the ghosting problem during occlusion
vertical