Usage of hud in vismach?
08 Jan 2023 13:47 - 08 Jan 2023 14:13 #261262
by Aciera
Replied by Aciera on topic Usage of hud in vismach?
I've been playing around with vismach lately and wanted the hud to display updated axis values. I have modified the 'Hud(object)' class to create a new class 'HalHud(object)' which lets me pass any number of pins to the hud from my vismach script like this:
# start hud
myhud = HalHud(c, ['axis-x: ' ,'axis-y: ', 'axis-z: '], ["{:10.4f}","{:10.4f}","{:10.4f}"], ["axis_x", "axis_y", "axis_z"])
myhud.show_top("XYZABC-TRSRN")
myhud.show_top("------------")
myhud.show("-------------")
myhud.show("The End")
# end hud
class HalHud(object):
'''head up display - draws a semi-transparent text box.
use HUD.strs for things that must be updated constantly,
and HUD.show("stuff") for one-shot things like error messages'''
def __init__(self, comp, strings, formats, var):
self.showme = 0
self.app =
self.strs =
self.messages =
self.messages_top =
self.fontbase =
self.comp = comp
self.strings = strings
self.formats = formats
self.var = var
def show_top(self, string):
self.showme = 1
self.messages_top += [str(string)]
def show(self, string):
self.showme = 1
self.messages += [str(string)]
def hide(self):
self.showme = 0
def clear(self):
self.messages =
def draw(self):
self.strs =
# create the strings with the updated values using the corresponding list elements
for n in range(len(self.strings)):
self.strs += [self.strings[n] + str(self.formats[n].format(self.comp[self.var[n]]))]
drawtext = self.messages_top + self.strs + self.messages
self.lines = len(drawtext)
#draw head-up-display
#see axis.py for more font/color configurability
if ((self.showme == 0) or (self.lines == 0)):
return
glMatrixMode(GL_PROJECTION)
glPushMatrix()
glLoadIdentity()
if not self.fontbase:
self.fontbase = int(self.app.loadbitmapfont("9x15"))
char_width, char_height = 9, 15
xmargin,ymargin = 5,5
ypos = float(self.app.winfo_height())
glOrtho(0.0, self.app.winfo_width(), 0.0, ypos, -1.0, 1.0)
glMatrixMode(GL_MODELVIEW)
glPushMatrix()
glLoadIdentity()
#draw the text box
maxlen = max([len(p) for p in drawtext])
box_width = maxlen * char_width
glDepthFunc(GL_ALWAYS)
glDepthMask(GL_FALSE)
glDisable(GL_LIGHTING)
glEnable(GL_BLEND)
glEnable(GL_NORMALIZE)
glBlendFunc(GL_ONE, GL_CONSTANT_ALPHA)
glColor3f(0,0.2,0) # sets the color of the hud overlay
glBlendColor(0,0,0,0.5) #rgba, sets the transparency of the overlay using the 'a' value
glBegin(GL_QUADS)
glVertex3f(0, ypos, 1) #upper left
glVertex3f(0, ypos - 2*ymargin - char_height*len(drawtext), 1) #lower left
glVertex3f(box_width+2*xmargin, ypos - 2*ymargin - char_height*len(drawtext), 1) #lower right
glVertex3f(box_width+2*xmargin, ypos , 1) #upper right
glEnd()
glDisable(GL_BLEND)
glEnable(GL_LIGHTING)
#fill the box with text
maxlen = 0
ypos -= char_height+ymargin
i=0
glDisable(GL_LIGHTING)
glColor3f(0.9,0.9,0.0) # sets the color of the text in the hud
for string in drawtext:
maxlen = max(maxlen, len(string))
glRasterPos2i(xmargin, int(ypos))
for char in string:
glCallList(self.fontbase + ord(char))
ypos -= char_height
i = i + 1
glDepthFunc(GL_LESS)
glDepthMask(GL_TRUE)
glEnable(GL_LIGHTING)
glPopMatrix()
glMatrixMode(GL_PROJECTION)
glPopMatrix()
glMatrixMode(GL_MODELVIEW)Attachments:
Please Log in or Create an account to join the conversation.
Time to create page: 0.084 seconds