def draw_textured_rect_subtriangle(
origin, dx, dy, tex_origin, tex_dx, tex_dy, points
): # 070404 modified from draw_textured_rect
"""
Like draw_textured_rect, but draw only the sub-triangle of the same rect (textured in the same way),
where the subtriangle has relative 2d vertices as specified inside that rect (treating its own coords as each in [0.0, 1.0]).
WARNING: depending on the glEnables set up by the caller, the sub-triangle coords might need to be
in CCW winding order for the triangle to be visible from the front.
"""
# e could easily generalize API to polygon, and this implem to convex polygon, if desired
##e WARNING: this function's name and api are likely to be revised;
# or we might just replace the whole scheme, using things like Textured(Triangle(...),...) instead,
# perhaps implemented by telling OpenGL how to compute the texture coords in a wrapper, then just drawing the triangle.
assert len(points) == 3
# and each point should be a V of length 2, or a 2-tuple, with elements convertible to floats -- this is assumed below
glEnable(GL_TEXTURE_2D)
glBegin(GL_TRIANGLES)
for px, py in points:
px = float(px)
py = float(py)
glTexCoord2fv((tex_origin + px * tex_dx + py * tex_dy).tolist())
# glVertex3fv(origin + px * dx + py * dy)
glEnd()
glDisable(GL_TEXTURE_2D)
def __gen_gl_code(faces, mtls, normals, vertices, texcoords):
gl_list = glGenLists(1)
glNewList(gl_list, GL_COMPILE)
glEnable(GL_TEXTURE_2D)
glFrontFace(GL_CCW)
for face in faces:
face_vertices, face_normals, texture_coords, material = face
try:
mtl = mtls[material]
if 'texture_Kd' in mtl:
# use diffuse texmap
glBindTexture(GL_TEXTURE_2D, mtl['texture_Kd'])
else:
# just use diffuse colour
glColor(mtl['Kd'])
except KeyError:
print("Key error" + str(material))
glColor((1, 1, 1))
glBegin(GL_POLYGON)
for i in range(len(face_vertices)):
if face_normals[i] > 0:
glNormal3fv(normals[face_normals[i] - 1])
if texture_coords[i] > 0:
glTexCoord2fv(texcoords[texture_coords[i] - 1])
glVertex3fv(vertices[face_vertices[i] - 1])
glEnd()
glDisable(GL_TEXTURE_2D)
glEndList()
return gl_list
def draw_textured_rect_subtriangle(
origin, dx, dy, tex_origin, tex_dx, tex_dy,
points): #070404 modified from draw_textured_rect
"""
Like draw_textured_rect, but draw only the sub-triangle of the same rect (textured in the same way),
where the subtriangle has relative 2d vertices as specified inside that rect (treating its own coords as each in [0.0, 1.0]).
WARNING: depending on the glEnables set up by the caller, the sub-triangle coords might need to be
in CCW winding order for the triangle to be visible from the front.
"""
#e could easily generalize API to polygon, and this implem to convex polygon, if desired
##e WARNING: this function's name and api are likely to be revised;
# or we might just replace the whole scheme, using things like Textured(Triangle(...),...) instead,
# perhaps implemented by telling OpenGL how to compute the texture coords in a wrapper, then just drawing the triangle.
assert len(points) == 3
# and each point should be a V of length 2, or a 2-tuple, with elements convertible to floats -- this is assumed below
glEnable(GL_TEXTURE_2D)
glBegin(GL_TRIANGLES)
for px, py in points:
px = float(px)
py = float(py)
glTexCoord2fv(tex_origin + px * tex_dx + py * tex_dy)
glVertex3fv(origin + px * dx + py * dy)
glEnd()
glDisable(GL_TEXTURE_2D)
def build_from_mesh_data(self, mesh_data: MeshData):
"""Uses a loaded mesh to create 3d geometry to store in the view.
All groups in the mesh will pre-computed and stored by name.
:param mesh_data: the source data that 3d geometry will be pre-computed from.
"""
material_library = mesh_data.material_library
for key in mesh_data.groups:
new_gl_list = glGenLists(1) # pylint: disable=assignment-from-no-return
glNewList(new_gl_list, GL_COMPILE)
group = mesh_data.groups[key]
glEnable(GL_TEXTURE_2D)
glFrontFace(GL_CCW)
for face in group.faces:
self._apply_material(
material_library.get_material_by_name(face.material))
# Polygon (N verts) with optional normals and tex coords
glBegin(GL_POLYGON)
for i in range(face.vertex_count):
normal_index = face.normal_ids[i]
if normal_index > 0:
glNormal3fv(mesh_data.normals[normal_index - 1])
tex_coord_index = face.tex_ids[i]
if tex_coord_index > 0:
glTexCoord2fv(mesh_data.tex_coords[tex_coord_index -
1])
glVertex3fv(mesh_data.vertices[face.position_ids[i] - 1])
glEnd()
glDisable(GL_TEXTURE_2D)
glEndList()
self._display_lists[key] = new_gl_list
def draw_textured_rect(origin, dx, dy, tex_origin, tex_dx, tex_dy):
"""
Fill a spatial rect defined by the 3d points (origin, dx, dy)
with the 2d-texture subrect defined by the 2d points (tex_origin, tex_dx, tex_dy)
in the currently bound texture object.
"""
glEnable(GL_TEXTURE_2D)
glBegin(GL_QUADS)
glTexCoord2fv(tex_origin) # tex coords have to come before vertices, I think! ###k
glVertex3fv(origin)
glTexCoord2fv(tex_origin + tex_dx)
glVertex3fv(origin + dx)
glTexCoord2fv(tex_origin + tex_dx + tex_dy)
glVertex3fv(origin + dx + dy)
glTexCoord2fv(tex_origin + tex_dy)
glVertex3fv(origin + dy)
glEnd()
glDisable(GL_TEXTURE_2D)
def draw_textured_rect(origin, dx, dy, tex_origin, tex_dx, tex_dy):
"""
Fill a spatial rect defined by the 3d points (origin, dx, dy)
with the 2d-texture subrect defined by the 2d points (tex_origin, tex_dx, tex_dy)
in the currently bound texture object.
"""
glEnable(GL_TEXTURE_2D)
glBegin(GL_QUADS)
glTexCoord2fv(tex_origin) # tex coords have to come before vertices, I think! ###k
glVertex3fv(origin)
glTexCoord2fv(tex_origin + tex_dx)
glVertex3fv(origin + dx)
glTexCoord2fv(tex_origin + tex_dx + tex_dy)
glVertex3fv(origin + dx + dy)
glTexCoord2fv(tex_origin + tex_dy)
glVertex3fv(origin + dy)
glEnd()
glDisable(GL_TEXTURE_2D)
def drawPlane(color, w, h, textureReady, opacity,
SOLID=False, pickCheckOnly=False, tex_coords=None):
"""
Draw polygon with size of <w>*<h> and with color <color>. Optionally, it
could be texuture mapped, translucent.
@pickCheckOnly This is used to draw the geometry only, used for OpenGL pick
selection purpose.
"""
vs = [[-0.5, 0.5, 0.0], [-0.5, -0.5, 0.0],
[0.5, -0.5, 0.0], [0.5, 0.5, 0.0]]
# piotr 080529: use external texture coordinates if provided
if tex_coords is None:
vt = [[0.0, 1.0], [0.0, 0.0], [1.0, 0.0], [1.0, 1.0]]
else:
vt = tex_coords
if textureReady:
opacity = 1.0
glDisable(GL_LIGHTING)
glColor4fv(list(color) + [opacity])
glPushMatrix()
glScalef(w, h, 1.0)
if SOLID:
glPolygonMode(GL_FRONT_AND_BACK, GL_FILL)
else:
glPolygonMode(GL_FRONT_AND_BACK, GL_LINE)
glDisable(GL_CULL_FACE)
if not pickCheckOnly:
# This makes sure a translucent object will not occlude another
# translucent object.
glDepthMask(GL_FALSE)
glEnable(GL_BLEND)
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA)
if textureReady:
glEnable(GL_TEXTURE_2D)
glBegin(GL_QUADS)
for ii in range(len(vs)):
t = vt[ii]; v = vs[ii]
if textureReady:
glTexCoord2fv(t)
glVertex3fv(v)
glEnd()
if not pickCheckOnly:
if textureReady:
glDisable(GL_TEXTURE_2D)
glDisable(GL_BLEND)
glDepthMask(GL_TRUE)
glEnable(GL_CULL_FACE)
if not SOLID:
glPolygonMode(GL_FRONT_AND_BACK, GL_FILL)
glPopMatrix()
glEnable(GL_LIGHTING)
return
def drawPlane(color,
w,
h,
textureReady,
opacity,
SOLID=False,
pickCheckOnly=False,
tex_coords=None):
"""
Draw polygon with size of <w>*<h> and with color <color>. Optionally, it
could be texuture mapped, translucent.
@pickCheckOnly This is used to draw the geometry only, used for OpenGL pick
selection purpose.
@param tex_coords: texture coordinates to be explicitly provided (for
simple image transformation purposes)
"""
vs = [[-0.5, 0.5, 0.0], [-0.5, -0.5, 0.0], [0.5, -0.5, 0.0],
[0.5, 0.5, 0.0]]
# piotr 080529: use external texture coordinates if provided
if tex_coords is None:
vt = [[0.0, 1.0], [0.0, 0.0], [1.0, 0.0], [1.0, 1.0]]
else:
vt = tex_coords
if textureReady:
opacity = 1.0
glDisable(GL_LIGHTING)
glColor4fv(list(color) + [opacity])
glPushMatrix()
glScalef(w, h, 1.0)
if SOLID:
glPolygonMode(GL_FRONT_AND_BACK, GL_FILL)
else:
glPolygonMode(GL_FRONT_AND_BACK, GL_LINE)
glDisable(GL_CULL_FACE)
if not pickCheckOnly:
# This makes sure a translucent object will not occlude another
# translucent object.
glDepthMask(GL_FALSE)
glEnable(GL_BLEND)
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA)
if textureReady:
glEnable(GL_TEXTURE_2D)
glBegin(GL_QUADS)
for ii in range(len(vs)):
t = vt[ii]
v = vs[ii]
if textureReady:
glTexCoord2fv(t)
glVertex3fv(v)
glEnd()
if not pickCheckOnly:
if textureReady:
glDisable(GL_TEXTURE_2D)
glDisable(GL_BLEND)
glDepthMask(GL_TRUE)
glEnable(GL_CULL_FACE)
if not SOLID:
glPolygonMode(GL_FRONT_AND_BACK, GL_FILL)
glPopMatrix()
glEnable(GL_LIGHTING)
return
