2017-07-06 15:54 GMT-03:00 Milind Gupta <[email protected]>:
> Also in the last example you sent with the gl.Ortho function on line 26 I
> had to change the y transformation from y = cnv_h-1 - y
>
> to y = cnv_h-2 - y to make it align with the frame border I think
> because when calculating y the frm_y point is contained in the frame
> rastersize so it is counted twice.
>
>
> On Thu, Jul 6, 2017 at 11:43 AM, Milind Gupta <[email protected]>
> wrote:
>
>> Hi Antonio,
>> Is it possible that I just use the Canvas Draw library to draw on
>> the glcanvasbox?
>>
>>
>> Milind
>>
>>
>> On Mon, Jul 3, 2017 at 11:57 PM, Milind Gupta <[email protected]>
>> wrote:
>>
>>> Hi Antonio,
>>> Thanks a lot. This is really helpful.
>>>
>>> Milind
>>>
>>>
>>> On Thu, Jun 29, 2017 at 8:26 PM, Antonio Scuri <[email protected]>
>>> wrote:
>>>
>>>> BTW,
>>>>
>>>> I know that this is just an example, but if you are going to draw
>>>> primitives in a canvas using elements as reference points, then I would
>>>> suggest you to use the same coordinate system as the IupGLCanvasBox
>>>> elements. For instance, using:
>>>>
>>>> gl.Ortho(0, width, 0, height, -1, 1)
>>>>
>>>> I attached a modified version of the example with this approach. Just
>>>> to illustrate.
>>>>
>>>> Best,
>>>> Scuri
>>>>
>>>>
>>>> 2017-06-30 0:20 GMT-03:00 Antonio Scuri <[email protected]>:
>>>>
>>>>> Hi,
>>>>>
>>>>> You set the frame position to be 10,10. That's where the 10 pixel
>>>>> offset came from. Experiment to set it to 50,50 and you will see that
>>>>> difference to increase even more.
>>>>>
>>>>> So what's missing is to offset the desired point by the frame
>>>>> position. For instance:
>>>>>
>>>>> local frm_x,frm_y = gframe.position:match("(%d+),(%d+)")
>>>>> local frm_w,frm_h = gframe.rastersize:match("(%d+)x(%d+)")
>>>>> local cnv_w,cnv_h = cnv.rastersize:match("(%d+)x(%d+)")
>>>>>
>>>>> -- calculate the bottom middle point
>>>>> local x = frm_x + frm_w/2
>>>>> local y = frm_y + frm_h
>>>>>
>>>>> local cnvx = cnv_w/2
>>>>> local cnvy = cnv_h/2
>>>>>
>>>>> Best,
>>>>> Scuri
>>>>>
>>>>> 2017-06-29 19:31 GMT-03:00 Milind Gupta <[email protected]>:
>>>>>
>>>>>> So the main thing is I am trying to use the frame box as a box in a
>>>>>> flow almost like a flowchart. So I want to connect lines from a frame box
>>>>>> to some other point.
>>>>>>
>>>>>> On Thu, Jun 29, 2017 at 3:29 PM, Milind Gupta <[email protected]
>>>>>> > wrote:
>>>>>>
>>>>>>> I have attached a sample code. This has a frame with just a label
>>>>>>> and 2 lines that are drawn from the center to the the bottom line. The
>>>>>>> red
>>>>>>> one gets the bottom from rastersize while the blue one adds an offset of
>>>>>>> 10.
>>>>>>>
>>>>>>> On Thu, Jun 29, 2017 at 1:26 PM, Antonio Scuri <
>>>>>>> [email protected]> wrote:
>>>>>>>
>>>>>>>> Hi,
>>>>>>>>
>>>>>>>> This is probably related to the space occupied by the TITLE area
>>>>>>>> and in which callback you are using to draw. Can't tell you what's the
>>>>>>>> best
>>>>>>>> solution with just that information.
>>>>>>>>
>>>>>>>> To draw elements aligned with IUP elements inside a
>>>>>>>> IupGLCanvasBox, I suggest you to use an IupGLSubCanvas element. You
>>>>>>>> will be
>>>>>>>> able to draw from 0 to rastersize in its GL_ACTION callback. Use the
>>>>>>>> layout
>>>>>>>> positioning to align the element inside the glframe.
>>>>>>>>
>>>>>>>> Best,
>>>>>>>> Scuri
>>>>>>>>
>>>>>>>>
>>>>>>>> 2017-06-29 17:08 GMT-03:00 Milind Gupta <[email protected]>:
>>>>>>>>
>>>>>>>>> Hi,
>>>>>>>>> I am trying to draw a line from the mid point of the base of
>>>>>>>>> a glframe. When I get the rastersize of the frame and use that to
>>>>>>>>> calculate
>>>>>>>>> the midpoint of the base the point comes about 10px below the frame
>>>>>>>>> line.
>>>>>>>>> How can I remove this margin so that rastersize gives me the
>>>>>>>>> dimension to
>>>>>>>>> the frame line. In the x direction there does not seem to be any
>>>>>>>>> margin.
>>>>>>>>> Or is there a way to accurately find out the margin below
>>>>>>>>> the frame line and then offset my line coordinate by that margin and
>>>>>>>>> then
>>>>>>>>> touch the frame line?
>>>>>>>>>
>>>>>>>>> Thanks,
>>>>>>>>> Milind
>>>>>>>>>
>>>>>>>>>
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