interrogating lines within a loaded svg

in Core Library Questions • 1 year ago

Hi All,

I'm loading a .svg file into processing; it contains all straight lines. Is there a method that I could use to call the starting and ending x/y coordinates for each line into an array?

best

Sam

Replies(5)

PhiLho

Re: interrogating lines within a loaded svg

1 year ago

Use getParams() on each child, param[0] to param[3] hold the coordinates of the line.

sammcelhi..

Re: interrogating lines within a loaded svg

1 year ago

hello phi.lho

thanks for this, it looks like the right thing to be doing... i've got as far as the following code.. but how would I load up the x y coodinates that I'm calling into a point array? I'm not sure how to call out a particular param?

thanks

Sam

palace = loadShape("ZAKROS.svg");
int totalLines = palace.getChildCount();
for (int i=0; i < totalLines; i++) {
PShape holding = palace.getChild(i);
holding.getParams();
}

PhiLho

Re: interrogating lines within a loaded svg

1 year ago

float[] params = holding.getParams();
I was a bit hasty in my first answer.
Note: for PShape, lot more info can be found in the JavaDoc than in the reference page. Or directly in the source code, where I searched...

sammcelhi..

Re: interrogating lines within a loaded svg

1 year ago

hey phi

yeah i've been checking them out a bit, as well as elsewhere in the forums.

to complicate things it looks as though the lines info is a layer down so I have to call getChild twice over, or else I get null pointer exceptions the getParams function... typical!

so now I have this:

palace = loadShape("ZAKROS.svg");
int totalLines = palace.getChildCount();
for (int i=0; i < totalLines; i++) {
PShape holding = palace.getChild(i);
PShape inside = holding.getChild(0);
float[] params = inside.getParams();
print(params[0]);
print(",");
println(params[3]);
}

the param values; are these vectors that I can use to draw a line?

sammcelhi..

Re: interrogating lines within a loaded svg

1 year ago

looks like they are when I count in params[0],[1],[2] and [3] as the xy coordinates of the start and end of the line... drawing nicely thanks!

for (int i=0; i < totalLines; i++) {
PShape holding = palace.getChild(i);
PShape inside = holding.getChild(0);
float[] params = inside.getParams();
print(params[0]);
print("-");
print(params[1]);
print(",");
println(params[2]);
print("-");
print(params[3]);
stroke(0);
strokeWeight(0.5);
line(params[0],params[1],params[2],params[3]);
}

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