Learning Hatch pattern Confuse

[Anonymous]

Hi All

i am Learning to create custom hatch pattern. and i try to understand AutoCAD hatch pattern but i don't understand these 2 hatch 

as i Understand Hatch pattern is  (Angle , OrgX, OrgY, DeltaX, DeltaY, +00(Line) 0(dot) and -000 (is Gap);

so in the Angle Hatch pattern there is no DeltaX in the second 90 deg line. how it create  Line in the x offset?

*ANGLE, Angle steel

0, 0,0, 0,.275, .2,-.075

90, 0,0, 0,.275, .2,-.075

And Second is

Rename of Solid "this does not work as AutoCAD solid hatch.. Why?

*ReSolid, ReSolid 

45, 0,0, 0,.125 

Thanks in Advance.

[Kent1Cooper]

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@Anonymous wrote:

.... 

as i Understand Hatch pattern is  (Angle , OrgX, OrgY, DeltaX, DeltaY, +00(Line) 0(dot) and -000 (is Gap);

so in the Angle Hatch pattern there is no DeltaX in the second 90 deg line. how it create  Line in the x offset?

*ANGLE, Angle steel

0, 0,0, 0,.275, .2,-.075

90, 0,0, 0,.275, .2,-.075

And Second is

Rename of Solid "this does not work as AutoCAD solid hatch.. Why?

*ReSolid, ReSolid 

45, 0,0, 0,.125 

.... 

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The first one is because of something that's often confusing -- while the X and Y coordinates of the origin point for a lineset [in this case the 0,0 entries in both linesets] is in relation to "World" orientation, the X and Y offsets [in this case the 0,.275 entries in both linesets] are in relation to the angle at the beginning of the definition line, and not to the "World" orientation.  So for a 90-degree lineset, "X" is upward [in that 90-degree direction] rather than to the right, and in relation to that orientation, there is no X offset for that lineset.

As to the second one, I believe the SOLID definition is a kind of "stand-in," and AutoCAD really does it differently somehow based on the SOLID name specifically, so giving that same definition line a different name will give you the "literal" result of that definition.  But I do have to ask: why would you want to use a SOLID pattern under a different name?

[Anonymous]

hi Kent Cooper 

Thanks for reply.

so for the first one.. if angle rotate, it mean Delta X and Delta Y also Rotate.

like 45, 0,0,   0.5,0.5,   0.5,-0.5

so when it draw it will rotate Delta X and Delta Y from the 0,0 . is that correct? is is apply to all hatch pattern? or just in some case. 

because i check and i did not get .1767766 in any dimension in this hatch. is am i missing any thing  or  am i  not understanding some thing. 

*FLEX, Flexible material
0, 0,0, 0,.25, .25,-.25
45, .25,0, .176776695296,.176776695296, .0625,-.2285533906

for the solid i am just testing as i mansion i am learning to create hatch pattern. 

[Kent1Cooper · Accepted solution]

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@Anonymous wrote:

.... i did not get .1767766 in any dimension in this hatch. is am i missing any thing  or  am i  not understanding some thing. 

.... 

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[Anonymous]

oh..... i see..

so it mean that delta x and delta y also rotate as per angle....

Thanks for clear me.

[ambrosl]

I will try to explain to you what is happening in a hatch pattern.

angle, x-origin,y-origin, delta-x,delta-y, dash-1,dash-2, …

angle, - Specifies the angle in which the line segment should be drawn based on the current UCS; think of this as rotating the UCS around the specified origin and that the line segment is always drawn along the X-axis

x-origin,y-origin, - Specifies the point origin in which the line segment should be started from

delta-x,delta-y, - Specifies an offset from the origin

dash-1,dash-2, - Specifies the dash gap sequence in which the line segment should be drawn

[Anonymous]

Hi Lee. thanks for reply...

Now i understand..

Thanks Again