def __init__(self, name, program, geometry):
self.name = name
self.program = program
self.geometry = geometry
# size of batched draw calls
self.batch = BATCH_SIZE
self.vertex_attr = glGetAttribLocation(self.program.id, b"vertex")
self.edge_attr = glGetAttribLocation(self.program.id, b"edge")
self.index_attr = glGetAttribLocation(self.program.id, b"index")
# load/bind/configure vertex buffer
self.vertex_buffer = VertexBuffer(GLfloat, GL_STATIC_DRAW)
batched_edges = list(geometry.edges) * self.batch
self.vertex_buffer.load(memory.create_vertex_buffer(batched_edges))
self.vertex_buffer.partition(
[(self.vertex_attr, 4), (self.edge_attr, 3)]
)
uniform_indicies = []
for i in range(self.batch):
uniform_indicies.extend([i] * geometry.num_vertex)
indices_buffer = memory.create_vertex_buffer(uniform_indicies)
self.indices_buffer = VertexBuffer(GLfloat, GL_STATIC_DRAW)
self.indices_buffer.load(indices_buffer)
self.indices_buffer.set(self.index_attr, 1)
def __init__(self, name, program, geometry):
self.name = name
self.program = program
self.geometry = geometry
# size of batched draw calls
self.batch = BATCH_SIZE
self.vertex_attr = glGetAttribLocation(self.program.id, b"vertex")
self.edge_attr = glGetAttribLocation(self.program.id, b"edge")
self.index_attr = glGetAttribLocation(self.program.id, b"index")
# load/bind/configure vertex buffer
self.vertex_buffer = VertexBuffer(GLfloat, GL_STATIC_DRAW)
batched_edges = list(geometry.edges) * self.batch
self.vertex_buffer.load(memory.create_vertex_buffer(batched_edges))
self.vertex_buffer.partition([(self.vertex_attr, 4),
(self.edge_attr, 3)])
uniform_indicies = []
for i in range(self.batch):
uniform_indicies.extend([i] * geometry.num_vertex)
indices_buffer = memory.create_vertex_buffer(uniform_indicies)
self.indices_buffer = VertexBuffer(GLfloat, GL_STATIC_DRAW)
self.indices_buffer.load(indices_buffer)
self.indices_buffer.set(self.index_attr, 1)
def __init__(self, scale, vertices, indices, exclude):
self.scale = scale
self.vertices = create_vertex_buffer(vertices)
self.indices = create_index_buffer(indices)
self.num_vertex = len(indices)
self.edges = self.calculate_edges(exclude)
def __init__(self, scale, vertices, indices, exclude):
self.scale = scale
self.vertices = create_vertex_buffer(vertices)
self.indices = create_index_buffer(indices)
self.num_vertex = len(indices)
self.edges = self.calculate_edges(exclude)
def calculate_edges(self, excludes):
"""Builds a vertex list adding barycentric coordinates to each vertex.
Used to draw turtle borders efficiently, specialised to draw only the
some edges. See below for references.
http://stackoverflow.com/questions/18035719/drawing-a-border-on-a-2d-polygon-with-a-fragment-shader # NOQA
http://codeflow.org/entries/2012/aug/02/easy-wireframe-display-with-barycentric-coordinates/ # NOQA
http://strattonbrazil.blogspot.co.uk/2011/09/single-pass-wireframe-rendering_11.html # NOQA
"""
edges = []
MEW = 100.0
if excludes is None:
excludes = [0] * len(self.indices) * 2
for i in range(0, len(self.indices), 3): # each triangle
i0 = self.indices[i+0] * 4
i1 = self.indices[i+1] * 4
i2 = self.indices[i+2] * 4
e0 = excludes[i+0]
e1 = excludes[i+1]
e2 = excludes[i+2]
p0 = self.vertices[i0:i0+4]
p1 = self.vertices[i1:i1+4]
p2 = self.vertices[i2:i2+4]
v0 = self.vec2minus(p2, p1)
v1 = self.vec2minus(p2, p0)
v2 = self.vec2minus(p1, p0)
area = fabs(v1[0]*v2[1] - v1[1] * v2[0])
c0 = (area/self.magnitude(v0), e1 * MEW, e2 * MEW)
c1 = (e0 * MEW, area/self.magnitude(v1), e2 * MEW)
c2 = (e0 * MEW, e1 * MEW, area/self.magnitude(v2))
edges.extend(p0)
edges.extend(c0)
edges.extend(p1)
edges.extend(c1)
edges.extend(p2)
edges.extend(c2)
return create_vertex_buffer(edges)
def calculate_edges(self, excludes):
"""Builds a vertex list adding barycentric coordinates to each vertex.
Used to draw turtle borders efficiently, specialised to draw only the
some edges. See below for references.
http://stackoverflow.com/questions/18035719/drawing-a-border-on-a-2d-polygon-with-a-fragment-shader # NOQA
http://codeflow.org/entries/2012/aug/02/easy-wireframe-display-with-barycentric-coordinates/ # NOQA
http://strattonbrazil.blogspot.co.uk/2011/09/single-pass-wireframe-rendering_11.html # NOQA
"""
edges = []
MEW = 100.0
if excludes is None:
excludes = [0] * len(self.indices) * 2
for i in range(0, len(self.indices), 3): # each triangle
i0 = self.indices[i + 0] * 4
i1 = self.indices[i + 1] * 4
i2 = self.indices[i + 2] * 4
e0 = excludes[i + 0]
e1 = excludes[i + 1]
e2 = excludes[i + 2]
p0 = self.vertices[i0:i0 + 4]
p1 = self.vertices[i1:i1 + 4]
p2 = self.vertices[i2:i2 + 4]
v0 = self.vec2minus(p2, p1)
v1 = self.vec2minus(p2, p0)
v2 = self.vec2minus(p1, p0)
area = fabs(v1[0] * v2[1] - v1[1] * v2[0])
c0 = (area / self.magnitude(v0), e1 * MEW, e2 * MEW)
c1 = (e0 * MEW, area / self.magnitude(v1), e2 * MEW)
c2 = (e0 * MEW, e1 * MEW, area / self.magnitude(v2))
edges.extend(p0)
edges.extend(c0)
edges.extend(p1)
edges.extend(c1)
edges.extend(p2)
edges.extend(c2)
return create_vertex_buffer(edges)