def setupDraw(self, highlighted = False, selected = False,
patterning = True, highlight_color = None, opacity = 1.0):
"""
Set up for hover-highlighting and selection drawing styles.
There is similar code in CSDL.draw(), which has similar arguments.
XXX Does Solid and halo now, need to implement patterned drawing too.
"""
# Shader needs to be active to set uniform variables.
wasActive = self._active
if not wasActive:
self.setActive(True)
pass
patterned_highlighting = (False and # XXX
patterning and
isPatternedDrawing(highlight = highlighted))
# note: patterned_highlighting variable is not yet used here [bruce 090304 comment]
halo_selection = (selected and
env.prefs[selectionColorStyle_prefs_key] == SS_HALO)
halo_highlighting = (highlighted and
env.prefs[hoverHighlightingColorStyle_prefs_key] ==
HHS_HALO)
# Halo drawing style is used for hover-highlighing and halo-selection.
drawing_style = DS_NORMAL # Solid drawing by default.
if halo_highlighting or halo_selection:
drawing_style = DS_HALO
# Halo drawing was first implemented with wide-line drawing, which
# extends to both sides of the polygon edge. The halo is actually
# half the wide-line width that is specified by the setting.
# XXX The setting should be changed to give the halo width instead.
halo_width = env.prefs[haloWidth_prefs_key] / 2.0
# The halo width is specified in viewport pixels, as is the window
# width the viewport transform maps onto. In post-projection and
# clipping normalized device coords (+-1), it's a fraction of the
# window half-width of 1.0 .
ndc_halo_width = halo_width / (self.window_width / 2.0)
glUniform1fARB(self._uniform("ndc_halo_width"), ndc_halo_width)
elif highlighted or selected:
drawing_style = DS_NORMAL # Non-halo highlighting or selection.
glUniform1iARB(self._uniform("drawing_style"), drawing_style)
# Color for selection or highlighted drawing.
override_color = None
if highlighted:
if highlight_color is None: # Default highlight color.
override_color = env.prefs[hoverHighlightingColor_prefs_key]
else: # Highlight color passed as an argument.
override_color = highlight_color
elif selected:
override_color = env.prefs[selectionColor_prefs_key]
pass
if override_color:
if len(override_color) == 3:
override_color += (opacity,)
pass
glUniform4fvARB(self._uniform("override_color"), 1, override_color)
pass
if not wasActive:
self.setActive(False)
pass
return
def setupDraw(self, highlighted = False, selected = False,
patterning = True, highlight_color = None, opacity = 1.0):
"""
Set up for hover-highlighting and selection drawing styles.
There is similar code in CSDL.draw(), which has similar arguments.
XXX Does Solid and halo now, need to implement patterned drawing too.
"""
# Shader needs to be active to set uniform variables.
wasActive = self._active
if not wasActive:
self.setActive(True)
pass
patterned_highlighting = (False and # XXX
patterning and
isPatternedDrawing(highlight = highlighted))
# note: patterned_highlighting variable is not yet used here [bruce 090304 comment]
halo_selection = (selected and
env.prefs[selectionColorStyle_prefs_key] == SS_HALO)
halo_highlighting = (highlighted and
env.prefs[hoverHighlightingColorStyle_prefs_key] ==
HHS_HALO)
# Halo drawing style is used for hover-highlighing and halo-selection.
drawing_style = DS_NORMAL # Solid drawing by default.
if halo_highlighting or halo_selection:
drawing_style = DS_HALO
# Halo drawing was first implemented with wide-line drawing, which
# extends to both sides of the polygon edge. The halo is actually
# half the wide-line width that is specified by the setting.
# XXX The setting should be changed to give the halo width instead.
halo_width = env.prefs[haloWidth_prefs_key] / 2.0
# The halo width is specified in viewport pixels, as is the window
# width the viewport transform maps onto. In post-projection and
# clipping normalized device coords (+-1), it's a fraction of the
# window half-width of 1.0 .
ndc_halo_width = halo_width / (self.window_width / 2.0)
glUniform1fARB(self._uniform("ndc_halo_width"), ndc_halo_width)
elif highlighted or selected:
drawing_style = DS_NORMAL # Non-halo highlighting or selection.
glUniform1iARB(self._uniform("drawing_style"), drawing_style)
# Color for selection or highlighted drawing.
override_color = None
if highlighted:
if highlight_color is None: # Default highlight color.
override_color = env.prefs[hoverHighlightingColor_prefs_key]
else: # Highlight color passed as an argument.
override_color = highlight_color
elif selected:
override_color = env.prefs[selectionColor_prefs_key]
pass
if override_color:
if len(override_color) == 3:
override_color += (opacity,)
pass
glUniform4fvARB(self._uniform("override_color"), 1, override_color)
pass
if not wasActive:
self.setActive(False)
pass
return
def configShader(self, glpane):
"""
Fill in uniform variables in the shader self, before using it to draw.
@param glpane: The current glpane, containing NE1 graphics context
information related to the drawing environment. This is used to
find proper values for uniform variables we set in the shader.
"""
# Can't do anything good after an error loading the shader programs.
if self.error:
return
# Shader needs to be active to set uniform variables.
wasActive = self._active
if not wasActive:
self.setActive(True)
pass
# Debugging control.
if self._has_uniform_debug_code:
# review: use _has_uniform("debug_code") instead?
glUniform1iARB(
self._uniform("debug_code"),
int(debug_pref("GLPane: shader debug graphics?",
Choice_boolean_False, prefs_key = True)))
# Default override_opacity, multiplies the normal color alpha component.
glUniform1fARB(self._uniform("override_opacity"), 1.0)
# Russ 081208: Consider caching the glpane pointer. GLPane_minimal
# inherits from QGLWidget, which includes the OpenGL graphics context.
# Currently we share 'display list context' and related information
# across two kinds of OpenGL contexts, the main GLPane and the
# ThumbViews used to select atom types, show clipboard parts, and maybe
# more. In the future it may be more complicated. Then we may need to
# be more specific about accounting for what's in particular contexts.
# XXX Hook in full NE1 lighting scheme and material settings.
# Material is [ambient, diffuse, specular, shininess].
glUniform4fvARB(self._uniform("material"), 1, [0.3, 0.6, 0.5, 20.0])
glUniform1iARB(self._uniform("perspective"), (1, 0)[glpane.ortho])
# See GLPane._setup_projection().
vdist = glpane.vdist
# See GLPane_minimal.setDepthRange_Normal().
near = vdist * (glpane.near + glpane.DEPTH_TWEAK)
far = vdist * glpane.far
glUniform4fvARB(self._uniform("clip"), 1,
[near, far, 0.5*(far + near), 1.0/(far - near)])
# The effect of setDepthRange_Highlighting() is done as the shaders
# set the gl_FragDepth during a highlighted drawing style.
glUniform1fARB(self._uniform("DEPTH_TWEAK"), glpane.DEPTH_TWEAK)
# Pixel width of window for halo drawing calculations.
self.window_width = glpane.width
# Single light for now.
# XXX Get NE1 lighting environment state.
glUniform4fvARB(self._uniform("intensity"), 1, [1.0, 0.0, 0.0, 0.0])
light0 = A([-1.0, 1.0, 1.0])
glUniform3fvARB(self._uniform("light0"), 1, light0)
# Blinn shading highlight vector, halfway between the light and the eye.
eye = A([0.0, 0.0, 1.0])
halfway0 = norm((eye + light0) / 2.0)
glUniform3fvARB(self._uniform("light0H"), 1, halfway0)
if not wasActive:
self.setActive(False)
return
def configShader(self, glpane):
"""
Fill in uniform variables in the shader self, before using it to draw.
@param glpane: The current glpane, containing NE1 graphics context
information related to the drawing environment. This is used to
find proper values for uniform variables we set in the shader.
"""
# Can't do anything good after an error loading the shader programs.
if self.error:
return
# Shader needs to be active to set uniform variables.
wasActive = self._active
if not wasActive:
self.setActive(True)
pass
# Debugging control.
if self._has_uniform_debug_code:
# review: use _has_uniform("debug_code") instead?
glUniform1iARB(
self._uniform("debug_code"),
int(debug_pref("GLPane: shader debug graphics?",
Choice_boolean_False, prefs_key = True)))
# Default override_opacity, multiplies the normal color alpha component.
glUniform1fARB(self._uniform("override_opacity"), 1.0)
# Russ 081208: Consider caching the glpane pointer. GLPane_minimal
# inherits from QGLWidget, which includes the OpenGL graphics context.
# Currently we share 'display list context' and related information
# across two kinds of OpenGL contexts, the main GLPane and the
# ThumbViews used to select atom types, show clipboard parts, and maybe
# more. In the future it may be more complicated. Then we may need to
# be more specific about accounting for what's in particular contexts.
# XXX Hook in full NE1 lighting scheme and material settings.
# Material is [ambient, diffuse, specular, shininess].
glUniform4fvARB(self._uniform("material"), 1, [0.3, 0.6, 0.5, 20.0])
glUniform1iARB(self._uniform("perspective"), (1, 0)[glpane.ortho])
# See GLPane._setup_projection().
vdist = glpane.vdist
# See GLPane_minimal.setDepthRange_Normal().
near = vdist * (glpane.near + glpane.DEPTH_TWEAK)
far = vdist * glpane.far
glUniform4fvARB(self._uniform("clip"), 1,
[near, far, 0.5*(far + near), 1.0/(far - near)])
# The effect of setDepthRange_Highlighting() is done as the shaders
# set the gl_FragDepth during a highlighted drawing style.
glUniform1fARB(self._uniform("DEPTH_TWEAK"), glpane.DEPTH_TWEAK)
# Pixel width of window for halo drawing calculations.
self.window_width = glpane.width
# Single light for now.
# XXX Get NE1 lighting environment state.
glUniform4fvARB(self._uniform("intensity"), 1, [1.0, 0.0, 0.0, 0.0])
light0 = A([-1.0, 1.0, 1.0])
glUniform3fvARB(self._uniform("light0"), 1, light0)
# Blinn shading highlight vector, halfway between the light and the eye.
eye = A([0.0, 0.0, 1.0])
halfway0 = norm((eye + light0) / 2.0)
glUniform3fvARB(self._uniform("light0H"), 1, halfway0)
if not wasActive:
self.setActive(False)
return