michelez

Something I thought would be 15 minutes of work is turning into a real headache: I am trying to draw simple 2d shapes (triangle, rhombus...) and render them to a matrix via jit.gl.sketch. Ideally the triangle should be inscribed into the matrix touching its boundaries. I send the command "tri" to sketch and it works (though not exactly as expected, see example) if the matrix has same dimensions. Problem is that I need the same kind of triangle drawing to be rendered in an asymmetrical matrix (say, dim 100 24 for instance).

I have attached an example. I think I need to apply some ratio to the vertexes but I am not sure how.

PS Of courseI could convert the even dimensioned matrix into the asymmetrical one but I would still like to know how to correctly map coordinates with sketch in a situation of uneven dimensions

comment

message

loadbang

jit.pwindow

qmetro

jit.gl.render

jit.matrix

flonum

jit.gl.sketch

Something I thought would be 15 minutes of work is turning into a real headache: I am trying to draw simple 2d shapes (triangle, rhombus...)  and render them to a matrix via jit.gl.sketch. Ideally the triangle should be inscribed into the matrix touching its boundaries. I send the command "tri" to sketch and it works (though not exactly as expected, see example) if the matrix has same dimensions. Problem is that I need the same kind of triangle drawing to be rendered in an asymmetrical matrix (say, dim 100 24 for instance).
I have attached an example. I think I need to apply some ratio to the vertexes  but I am not sure how.

PS Of courseI could convert the even dimensioned matrix into the asymmetrical one but I would still like to know how to correctly map coordinates with sketch in a situation of uneven dimensions


Hi!
Something I thought would be 15 minutes of work is turning into a real headache: I am trying to draw simple 2d shapes (triangle, rhombus

sketch-coordinates-in-asymmetrical-matrix

the different shapes you are getting are a result of differing aspect ratios of your context destination matrices. if you want identical shapes from identical world coordinates, then the aspect ratios must also be identical.

you can then simply send the matrix into another matrix that will linearly interpolate. but really depends on what you're trying to achieve.

(dest_dim and matrixoutput have not affect on a jit.gl.render object)

the different shapes you are getting are a result of differing aspect ratios of your context destination matrices. if you want identical shapes from identical world coordinates, then the aspect ratios must also be identical.

you can then simply send the matrix into another matrix that will linearly interpolate. but really depends on what you're trying to achieve.

(dest_dim and matrixoutput have not affect on a jit.gl.render object)

Thanks Rob, yes I ended up just doing matrix conversion, the easiest solution for what I was trying to do.

sketch coordinates in asymmetrical matrix