def animated_square(cfg, color=(1, 0.66, 0), rotate=True, scale=True, translate=True):
"""Animated Translate/Scale/Rotate on a square"""
cfg.duration = 5.0
cfg.aspect_ratio = (1, 1)
sz = 1 / 3.0
q = ngl.Quad((-sz / 2, -sz / 2, 0), (sz, 0, 0), (0, sz, 0))
node = ngl.RenderColor(color, geometry=q)
coords = [(-1, 1), (1, 1), (1, -1), (-1, -1), (-1, 1)]
if rotate:
animkf = (ngl.AnimKeyFrameFloat(0, 0), ngl.AnimKeyFrameFloat(cfg.duration, 360))
node = ngl.Rotate(node, angle=ngl.AnimatedFloat(animkf))
if scale:
animkf = (
ngl.AnimKeyFrameVec3(0, (1, 1, 1)),
ngl.AnimKeyFrameVec3(cfg.duration / 2, (2, 2, 2)),
ngl.AnimKeyFrameVec3(cfg.duration, (1, 1, 1)),
)
node = ngl.Scale(node, factors=ngl.AnimatedVec3(animkf))
if translate:
animkf = []
tscale = 1.0 / float(len(coords) - 1) * cfg.duration
for i, xy in enumerate(coords):
pos = (xy[0] * 0.5, xy[1] * 0.5, 0)
t = i * tscale
animkf.append(ngl.AnimKeyFrameVec3(t, pos))
node = ngl.Translate(node, vector=ngl.AnimatedVec3(animkf))
return node
def velocity_circle_distort_3d(cfg):
cfg.duration = 4.0
cfg.aspect_ratio = (1, 1)
coords = list(equilateral_triangle_coords())
coords.append(coords[0])
pos_kf = [
ngl.AnimKeyFrameVec3(cfg.duration * i / 3.0, pos, "exp_in_out")
for i, pos in enumerate(coords)
]
anim = ngl.AnimatedVec3(pos_kf)
velocity = ngl.VelocityVec3(anim)
vert = textwrap.dedent("""\
void main()
{
float distort_max = 0.1;
float velocity_l = length(velocity);
float direction_l = length(ngl_position);
vec3 normed_velocity = velocity_l == 0.0 ? vec3(0.0) : -velocity / velocity_l;
vec3 normed_direction = direction_l == 0.0 ? vec3(0.0) : ngl_position / direction_l;
float distort = clamp(dot(normed_velocity, normed_direction) / 2.0 * distort_max, 0.0, 1.0);
vec4 pos = vec4(ngl_position, 1.0) + vec4(-distort * velocity, 0.0);
ngl_out_pos = ngl_projection_matrix * ngl_modelview_matrix * pos;
}
""")
geom = ngl.Circle(radius=0.2, npoints=128)
prog = ngl.Program(vertex=vert, fragment=cfg.get_frag("color"))
shape = ngl.Render(geom, prog)
shape.update_frag_resources(color=ngl.UniformVec3(COLORS.white),
opacity=ngl.UniformFloat(1))
shape.update_vert_resources(velocity=velocity)
return ngl.Translate(shape, vector=anim)
def animated_uniform(cfg):
"""Uniform mat4 animated with a transform chain"""
m0 = cfg.medias[0]
cfg.aspect_ratio = (m0.width, m0.height)
q = ngl.Quad((-0.5, -0.5, 0), (1, 0, 0), (0, 1, 0))
m = ngl.Media(m0.filename)
t = ngl.Texture2D(data_src=m)
p = ngl.Program(vertex=cfg.get_vert("texture"),
fragment=cfg.get_frag("matrix-transform"))
p.update_vert_out_vars(var_uvcoord=ngl.IOVec2(),
var_tex0_coord=ngl.IOVec2())
ts = ngl.Render(q, p)
ts.update_frag_resources(tex0=t)
scale_animkf = [
ngl.AnimKeyFrameVec3(0, (1, 1, 1)),
ngl.AnimKeyFrameVec3(cfg.duration, (0.1, 0.1, 0.1), "quartic_out"),
]
s = ngl.Scale(ngl.Identity(), factors=ngl.AnimatedVec3(scale_animkf))
rotate_animkf = [
ngl.AnimKeyFrameFloat(0, 0),
ngl.AnimKeyFrameFloat(cfg.duration, 360, "exp_out")
]
r = ngl.Rotate(s, axis=(0, 0, 1), angle=ngl.AnimatedFloat(rotate_animkf))
u = ngl.UniformMat4(transform=r)
ts.update_frag_resources(matrix=u)
return ts
def animated_uniform(cfg):
'''Uniform mat4 animated with a transform chain'''
m0 = cfg.medias[0]
cfg.aspect_ratio = (m0.width, m0.height)
q = ngl.Quad((-0.5, -0.5, 0), (1, 0, 0), (0, 1, 0))
m = ngl.Media(m0.filename)
t = ngl.Texture2D(data_src=m)
p = ngl.Program(vertex=cfg.get_vert('texture'),
fragment=cfg.get_frag('matrix-transform'))
ts = ngl.Render(q, p)
ts.update_textures(tex0=t)
scale_animkf = [
ngl.AnimKeyFrameVec3(0, (1, 1, 1)),
ngl.AnimKeyFrameVec3(cfg.duration, (0.1, 0.1, 0.1), 'quartic_out')
]
s = ngl.Scale(ngl.Identity(), anim=ngl.AnimatedVec3(scale_animkf))
rotate_animkf = [
ngl.AnimKeyFrameFloat(0, 0),
ngl.AnimKeyFrameFloat(cfg.duration, 360, 'exp_out')
]
r = ngl.Rotate(s, axis=(0, 0, 1), anim=ngl.AnimatedFloat(rotate_animkf))
u = ngl.UniformMat4(transform=r)
ts.update_uniforms(matrix=u)
return ts
def animated_camera(cfg, rotate=True):
'''Animated camera around a scene'''
g = ngl.Group()
q = ngl.Quad((-0.5, -0.5, 0), (1, 0, 0), (0, 1, 0))
m = ngl.Media(cfg.medias[0].filename)
t = ngl.Texture2D(data_src=m)
program = ngl.Program(vertex=cfg.get_vert('texture'),
fragment=cfg.get_frag('texture'))
program.update_vert_out_vars(var_uvcoord=ngl.IOVec2(),
var_tex0_coord=ngl.IOVec2())
node = ngl.Render(q, program)
node.update_frag_resources(tex0=t)
g.add_children(node)
translate = ngl.Translate(node, vector=(-0.6, 0.8, -1))
g.add_children(translate)
translate = ngl.Translate(node, vector=(0.6, 0.8, -1))
g.add_children(translate)
translate = ngl.Translate(node, vector=(-0.6, -0.5, -1))
g.add_children(translate)
translate = ngl.Translate(node, vector=(0.6, -0.5, -1))
g.add_children(translate)
g = ngl.GraphicConfig(g, depth_test=True)
camera = ngl.Camera(g)
camera.set_eye(0, 0, 2)
camera.set_center(0.0, 0.0, 0.0)
camera.set_up(0.0, 1.0, 0.0)
camera.set_perspective(45.0, cfg.aspect_ratio_float)
camera.set_clipping(0.1, 10.0)
tr_animkf = [
ngl.AnimKeyFrameVec3(0, (0.0, 0.0, 0.0)),
ngl.AnimKeyFrameVec3(10, (0.0, 0.0, 3.0), 'exp_out')
]
node = ngl.Translate(ngl.Identity(), anim=ngl.AnimatedVec3(tr_animkf))
if rotate:
rot_animkf = [
ngl.AnimKeyFrameFloat(0, 0),
ngl.AnimKeyFrameFloat(cfg.duration, 360, 'exp_out')
]
node = ngl.Rotate(node,
axis=(0, 1, 0),
anim=ngl.AnimatedFloat(rot_animkf))
camera.set_eye_transform(node)
fov_animkf = [
ngl.AnimKeyFrameFloat(0.5, 60.0),
ngl.AnimKeyFrameFloat(cfg.duration, 45.0, 'exp_out')
]
camera.set_fov_anim(ngl.AnimatedFloat(fov_animkf))
return camera
def color_negative_values_srgb(cfg):
cfg.duration = 5
kfs = (
# The elastic_in easing has the special property to undershoot under 0
ngl.AnimKeyFrameVec3(-5, value=(0.0, 0.0, 0.0)),
ngl.AnimKeyFrameVec3(5, value=(0.0, 0.0, 1.0), easing="elastic_in"),
)
color0 = ngl.AnimatedVec3(keyframes=kfs)
color1 = ngl.UniformVec3(value=(-1.0, -1.0, 1.0))
return ngl.RenderGradient(color0=color0, color1=color1, linear=True)
def transform_scale_animated(cfg, factors=(0.7, 1.4, 0)):
cfg.aspect_ratio = (1, 1)
cfg.duration = 2.0
shape = _transform_shape(cfg)
anim = [
ngl.AnimKeyFrameVec3(0, (0, 0, 0)),
ngl.AnimKeyFrameVec3(cfg.duration / 2.0, factors),
ngl.AnimKeyFrameVec3(cfg.duration, (0, 0, 0)),
]
return ngl.Scale(shape, factors=ngl.AnimatedVec3(anim))
def animated_camera(cfg, rotate=True):
"""Animated camera around a scene"""
g = ngl.Group()
q = ngl.Quad((-0.5, -0.5, 0), (1, 0, 0), (0, 1, 0))
m = ngl.Media(cfg.medias[0].filename)
t = ngl.Texture2D(data_src=m)
node = ngl.RenderTexture(t, geometry=q)
g.add_children(node)
translate = ngl.Translate(node, vector=(-0.6, 0.8, -1))
g.add_children(translate)
translate = ngl.Translate(node, vector=(0.6, 0.8, -1))
g.add_children(translate)
translate = ngl.Translate(node, vector=(-0.6, -0.5, -1))
g.add_children(translate)
translate = ngl.Translate(node, vector=(0.6, -0.5, -1))
g.add_children(translate)
g = ngl.GraphicConfig(g, depth_test=True)
camera = ngl.Camera(g)
camera.set_eye(0, 0, 2)
camera.set_center(0.0, 0.0, 0.0)
camera.set_up(0.0, 1.0, 0.0)
camera.set_clipping(0.1, 10.0)
tr_animkf = [
ngl.AnimKeyFrameVec3(0, (0.0, 0.0, 0.0)),
ngl.AnimKeyFrameVec3(10, (0.0, 0.0, 3.0), "exp_out")
]
node = ngl.Translate(ngl.Identity(), vector=ngl.AnimatedVec3(tr_animkf))
if rotate:
rot_animkf = [
ngl.AnimKeyFrameFloat(0, 0),
ngl.AnimKeyFrameFloat(cfg.duration, 360, "exp_out")
]
node = ngl.Rotate(node,
axis=(0, 1, 0),
angle=ngl.AnimatedFloat(rot_animkf))
camera.set_eye_transform(node)
perspective_animkf = [
ngl.AnimKeyFrameVec2(0.5, (60.0, cfg.aspect_ratio_float)),
ngl.AnimKeyFrameVec2(cfg.duration, (45.0, cfg.aspect_ratio_float),
"exp_out"),
]
camera.set_perspective(ngl.AnimatedVec2(perspective_animkf))
return camera
def transform_animated_camera(cfg):
cfg.duration = 5.
g = ngl.Group()
elems = (
('red', None),
('yellow', (-0.6, 0.8, -1)),
('green', (0.6, 0.8, -1)),
('cyan', (-0.6, -0.5, -1)),
('magenta', (0.6, -0.5, -1)),
)
quad = ngl.Quad((-0.5, -0.5, 0), (1, 0, 0), (0, 1, 0))
prog = ngl.Program(vertex=cfg.get_vert('color'),
fragment=cfg.get_frag('color'))
for color, vector in elems:
node = ngl.Render(quad, prog)
node.update_uniforms(color=ngl.UniformVec4(value=COLORS[color]))
if vector:
node = ngl.Translate(node, vector=vector)
g.add_children(node)
g = ngl.GraphicConfig(g, depth_test=True)
camera = ngl.Camera(g)
camera.set_eye(0, 0, 2)
camera.set_center(0.0, 0.0, 0.0)
camera.set_up(0.0, 1.0, 0.0)
camera.set_perspective(45.0, cfg.aspect_ratio_float)
camera.set_clipping(0.1, 10.0)
tr_animkf = [
ngl.AnimKeyFrameVec3(0, (0.0, 0.0, 0.0)),
ngl.AnimKeyFrameVec3(cfg.duration, (0.0, 0.0, 3.0))
]
eye_transform = ngl.Translate(ngl.Identity(),
anim=ngl.AnimatedVec3(tr_animkf))
rot_animkf = [
ngl.AnimKeyFrameFloat(0, 0),
ngl.AnimKeyFrameFloat(cfg.duration, 360)
]
eye_transform = ngl.Rotate(eye_transform,
axis=(0, 1, 0),
anim=ngl.AnimatedFloat(rot_animkf))
camera.set_eye_transform(eye_transform)
fov_animkf = [
ngl.AnimKeyFrameFloat(0.5, 60.0),
ngl.AnimKeyFrameFloat(cfg.duration, 45.0)
]
camera.set_fov_anim(ngl.AnimatedFloat(fov_animkf))
return camera
def transform_eye_camera(cfg):
cfg.duration = 3.0
cfg.aspect_ratio = (1, 1)
node = ngl.RenderGradient4(geometry=ngl.Circle(radius=0.7, npoints=128))
animkf = [
ngl.AnimKeyFrameVec3(0, (0, -0.5, 0)),
ngl.AnimKeyFrameVec3(cfg.duration / 2, (0, 1, 0)),
ngl.AnimKeyFrameVec3(cfg.duration, (0, -0.5, 0)),
]
return ngl.Camera(node, eye=ngl.AnimatedVec3(animkf))
def transform_translate_animated(cfg):
cfg.aspect_ratio = (1, 1)
cfg.duration = 3.0
p0, p1, p2 = equilateral_triangle_coords()
anim = [
ngl.AnimKeyFrameVec3(0, p0),
ngl.AnimKeyFrameVec3(1 * cfg.duration / 3.0, p1),
ngl.AnimKeyFrameVec3(2 * cfg.duration / 3.0, p2),
ngl.AnimKeyFrameVec3(cfg.duration, p0),
]
shape = _transform_shape(cfg)
return ngl.Translate(shape, vector=ngl.AnimatedVec3(anim))
def animated_square(cfg,
color=(1, 0.66, 0, 1),
rotate=True,
scale=True,
translate=True):
'''Animated Translate/Scale/Rotate on a square'''
cfg.duration = 5.0
cfg.aspect_ratio = (1, 1)
sz = 1 / 3.
q = ngl.Quad((-sz / 2, -sz / 2, 0), (sz, 0, 0), (0, sz, 0))
p = ngl.Program(vertex=cfg.get_vert('color'),
fragment=cfg.get_frag('color'))
node = ngl.Render(q, p)
ucolor = ngl.UniformVec4(value=color)
node.update_uniforms(color=ucolor)
coords = [(-1, 1), (1, 1), (1, -1), (-1, -1), (-1, 1)]
if rotate:
animkf = (ngl.AnimKeyFrameFloat(0, 0),
ngl.AnimKeyFrameFloat(cfg.duration, 360))
node = ngl.Rotate(node, anim=ngl.AnimatedFloat(animkf))
if scale:
animkf = (ngl.AnimKeyFrameVec3(0, (1, 1, 1)),
ngl.AnimKeyFrameVec3(cfg.duration / 2, (2, 2, 2)),
ngl.AnimKeyFrameVec3(cfg.duration, (1, 1, 1)))
node = ngl.Scale(node, anim=ngl.AnimatedVec3(animkf))
if translate:
animkf = []
tscale = 1. / float(len(coords) - 1) * cfg.duration
for i, xy in enumerate(coords):
pos = (xy[0] * .5, xy[1] * .5, 0)
t = i * tscale
animkf.append(ngl.AnimKeyFrameVec3(t, pos))
node = ngl.Translate(node, anim=ngl.AnimatedVec3(animkf))
return node
def transform_animated_camera(cfg):
cfg.duration = 5.0
g = ngl.Group()
elems = (
# fmt: off
(COLORS.red, None),
(COLORS.yellow, (-0.6, 0.8, -1)),
(COLORS.green, (0.6, 0.8, -1)),
(COLORS.cyan, (-0.6, -0.5, -1)),
(COLORS.magenta, (0.6, -0.5, -1)),
# fmt: on
)
quad = ngl.Quad((-0.5, -0.5, 0), (1, 0, 0), (0, 1, 0))
for color, vector in elems:
node = ngl.RenderColor(color, geometry=quad)
if vector:
node = ngl.Translate(node, vector=vector)
g.add_children(node)
g = ngl.GraphicConfig(g, depth_test=True)
camera = ngl.Camera(g)
camera.set_eye(0, 0, 2)
camera.set_center(0.0, 0.0, 0.0)
camera.set_up(0.0, 1.0, 0.0)
camera.set_clipping(0.1, 10.0)
tr_animkf = [
ngl.AnimKeyFrameVec3(0, (0.0, 0.0, 0.0)),
ngl.AnimKeyFrameVec3(cfg.duration, (0.0, 0.0, 3.0))
]
eye_transform = ngl.Translate(ngl.Identity(),
vector=ngl.AnimatedVec3(tr_animkf))
rot_animkf = [
ngl.AnimKeyFrameFloat(0, 0),
ngl.AnimKeyFrameFloat(cfg.duration, 360)
]
eye_transform = ngl.Rotate(eye_transform,
axis=(0, 1, 0),
angle=ngl.AnimatedFloat(rot_animkf))
camera.set_eye_transform(eye_transform)
perspective_animkf = [
ngl.AnimKeyFrameVec2(0.5, (60.0, cfg.aspect_ratio_float)),
ngl.AnimKeyFrameVec2(cfg.duration, (45.0, cfg.aspect_ratio_float)),
]
camera.set_perspective(ngl.AnimatedVec2(perspective_animkf))
return camera
def transform_skew_animated(cfg,
angles=(0, -60, 14),
axis=(1, 0, 0),
anchor=(0, 0.05, -0.5)):
cfg.aspect_ratio = (1, 1)
cfg.duration = 2.0
shape = _transform_shape(cfg)
anim = [
ngl.AnimKeyFrameVec3(0, (0, 0, 0)),
ngl.AnimKeyFrameVec3(cfg.duration / 2.0, angles),
ngl.AnimKeyFrameVec3(cfg.duration, (0, 0, 0)),
]
return ngl.Skew(shape,
angles=ngl.AnimatedVec3(anim),
axis=axis,
anchor=anchor)
def animated_circles(cfg):
'''Simple cyclic circles animation'''
group = ngl.Group()
cfg.duration = 5.
cfg.aspect_ratio = (1, 1)
radius = 0.2
n = 10
step = 360. / n
shape = ngl.Circle(radius=radius, npoints=128)
prog = ngl.Program(vertex=cfg.get_vert('color'),
fragment=cfg.get_frag('color'))
render = ngl.Render(shape, prog)
render.update_uniforms(color=ngl.UniformVec4([1.0] * 4))
for i in range(n):
mid_time = cfg.duration / 2.0
start_time = mid_time / (i + 2)
end_time = cfg.duration - start_time
scale_animkf = [
ngl.AnimKeyFrameVec3(start_time, (0, 0, 0)),
ngl.AnimKeyFrameVec3(mid_time, (1.0, 1.0, 1.0), 'exp_out'),
ngl.AnimKeyFrameVec3(end_time, (0, 0, 0), 'exp_in'),
]
angle = i * step
rotate_animkf = [
ngl.AnimKeyFrameFloat(start_time, 0),
ngl.AnimKeyFrameFloat(mid_time, angle, 'exp_out'),
ngl.AnimKeyFrameFloat(end_time, 0, 'exp_in'),
]
tnode = render
tnode = ngl.Scale(tnode, anim=ngl.AnimatedVec3(scale_animkf))
tnode = ngl.Translate(tnode, vector=(1 - radius, 0, 0))
tnode = ngl.Rotate(tnode, anim=ngl.AnimatedFloat(rotate_animkf))
group.add_children(tnode)
return group
def animated_circles(cfg):
"""Simple cyclic circles animation"""
group = ngl.Group()
cfg.duration = 5.0
cfg.aspect_ratio = (1, 1)
radius = 0.2
n = 10
step = 360.0 / n
shape = ngl.Circle(radius=radius, npoints=128)
render = ngl.RenderColor(geometry=shape)
for i in range(n):
mid_time = cfg.duration / 2.0
start_time = mid_time / (i + 2)
end_time = cfg.duration - start_time
scale_animkf = [
ngl.AnimKeyFrameVec3(start_time, (0, 0, 0)),
ngl.AnimKeyFrameVec3(mid_time, (1.0, 1.0, 1.0), "exp_out"),
ngl.AnimKeyFrameVec3(end_time, (0, 0, 0), "exp_in"),
]
angle = i * step
rotate_animkf = [
ngl.AnimKeyFrameFloat(start_time, 0),
ngl.AnimKeyFrameFloat(mid_time, angle, "exp_out"),
ngl.AnimKeyFrameFloat(end_time, 0, "exp_in"),
]
tnode = render
tnode = ngl.Scale(tnode, factors=ngl.AnimatedVec3(scale_animkf))
tnode = ngl.Translate(tnode, vector=(1 - radius, 0, 0))
tnode = ngl.Rotate(tnode, angle=ngl.AnimatedFloat(rotate_animkf))
group.add_children(tnode)
return group
def blending_and_stencil(cfg):
"""Scene using blending and stencil graphic features"""
cfg.duration = 5
vertex = cfg.get_vert("color")
fragment = cfg.get_frag("color")
program = ngl.Program(vertex=vertex, fragment=fragment)
circle = ngl.Circle(npoints=256)
cloud_color = ngl.UniformVec3(value=(1, 1, 1))
cloud_opacity = ngl.UniformFloat(0.4)
main_group = ngl.Group()
render = ngl.RenderColor(color=(0.2, 0.6, 1), label="sky")
config = ngl.GraphicConfig(
render,
stencil_test=True,
stencil_write_mask=0xFF,
stencil_func="always",
stencil_ref=1,
stencil_read_mask=0xFF,
stencil_fail="replace",
stencil_depth_fail="replace",
stencil_depth_pass="******",
)
main_group.add_children(config)
render = ngl.RenderColor(color=(1, 0.8, 0), geometry=circle, label="sun")
scale = ngl.Scale(render, (0.15, 0.15, 0.0))
translate = ngl.Translate(scale, (0.4, 0.3, 0))
main_group.add_children(translate)
cloud_group = ngl.Group(label="clouds")
centers = [
(-1.0, 0.85, 0.4),
(-0.5, 2.0, 1.0),
(0, 0.85, 0.4),
(1.0, 1.55, 0.8),
(0.6, 0.65, 0.075),
(0.5, 1.80, 1.25),
]
for center in centers:
render = ngl.Render(circle, program, blending="src_over")
render.update_frag_resources(color=cloud_color, opacity=cloud_opacity)
factor = cfg.rng.random() * 0.4 + center[2]
keyframe = cfg.duration * (cfg.rng.random() * 0.4 + 0.2)
animkf = (
ngl.AnimKeyFrameVec3(0, (factor, factor, 0)),
ngl.AnimKeyFrameVec3(keyframe, (factor + 0.1, factor + 0.1, 0)),
ngl.AnimKeyFrameVec3(cfg.duration, (factor, factor, 0)),
)
scale = ngl.Scale(render, factors=ngl.AnimatedVec3(animkf))
translate = ngl.Translate(scale, vector=(center[0], center[1], 0))
cloud_group.add_children(translate)
config = ngl.GraphicConfig(
cloud_group,
stencil_test=True,
stencil_write_mask=0x0,
stencil_func="equal",
stencil_ref=1,
stencil_read_mask=0xFF,
stencil_fail="keep",
stencil_depth_fail="keep",
stencil_depth_pass="******",
)
main_group.add_children(config)
camera = ngl.Camera(main_group)
camera.set_eye(0.0, 0.0, 2.0)
camera.set_center(0.0, 0.0, 0.0)
camera.set_up(0.0, 1.0, 0.0)
camera.set_orthographic(-cfg.aspect_ratio_float, cfg.aspect_ratio_float,
-1.0, 1.0)
camera.set_clipping(1.0, 10.0)
return camera
def _get_easing_node(cfg, easing, curve_zoom, color_program, nb_points=128):
text_vratio = 1 / 8.
graph_hpad_ratio = 1 / 16.
area_size = 2.0
width, height = area_size, area_size
text_height = text_vratio * height
pad_height = graph_hpad_ratio * height
# Colors
hue = random.uniform(0, 0.6)
color = list(colorsys.hls_to_rgb(hue, 0.6, 1.0)) + [1]
ucolor = ngl.UniformVec4(value=color)
graph_bg_ucolor = ngl.UniformVec4(value=(.15, .15, .15, 1))
normed_graph_bg_ucolor = ngl.UniformVec4(value=(0, 0, 0, 1))
line_ucolor = ngl.UniformVec4(value=(1, 1, 1, .4))
# Text legend
text = ngl.Text(text=easing,
fg_color=color,
padding=3,
bg_color=(0, 0, 0, 1),
box_corner=(-width / 2., height / 2. - text_height, 0),
box_width=(width, 0, 0),
box_height=(0, text_height, 0),
label='%s legend' % easing)
# Graph drawing area (where the curve may overflow)
graph_size = area_size - text_height - pad_height * 2
graph_block = _block(graph_size,
graph_size,
color_program,
corner=(-graph_size / 2,
-(graph_size + text_height) / 2, 0),
color=graph_bg_ucolor)
# Normed area of the graph
normed_graph_size = graph_size * curve_zoom
normed_graph_block = _block(normed_graph_size,
normed_graph_size,
color_program,
corner=(-normed_graph_size / 2,
-(normed_graph_size + text_height) / 2,
0),
color=normed_graph_bg_ucolor)
# Curve
easing_name, easing_args = _easing_split(easing)
curve_scale_factor = graph_size / area_size * curve_zoom
vertices_data = array.array('f')
for i in range(nb_points + 1):
t = i / float(nb_points)
v = ngl.easing_evaluate(easing_name, t, easing_args)
x = curve_scale_factor * (t * width - width / 2.)
y = curve_scale_factor * (v * height - height / 2.)
y -= text_height / 2.
vertices_data.extend([x, y, 0])
vertices = ngl.BufferVec3(data=vertices_data)
geometry = ngl.Geometry(vertices, topology='line_strip')
curve = ngl.Render(geometry, color_program, label='%s curve' % easing)
curve.update_uniforms(color=ucolor)
# Value cursor
y = 2 / 3. * pad_height
x = y * math.sqrt(3)
cursor_geometry = ngl.Triangle((-x, y, 0), (0, 0, 0), (-x, -y, 0))
cursor = ngl.Render(cursor_geometry,
color_program,
label='%s cursor' % easing)
cursor.update_uniforms(color=ucolor)
# Horizontal value line
hline_data = array.array('f', (0, 0, 0, graph_size, 0, 0))
hline_vertices = ngl.BufferVec3(data=hline_data)
hline_geometry = ngl.Geometry(hline_vertices, topology='line_strip')
hline = ngl.Render(hline_geometry,
color_program,
label='%s value line' % easing)
hline.update_uniforms(color=line_ucolor)
# Value animation (cursor + h-line)
value_x = -graph_size / 2.
value_y = (-text_height - normed_graph_size) / 2.
value_animkf = (
ngl.AnimKeyFrameVec3(0, (value_x, value_y, 0)),
ngl.AnimKeyFrameVec3(cfg.duration,
(value_x, value_y + normed_graph_size, 0),
easing_name, easing_args),
)
value_anim = ngl.Group(children=(hline, cursor))
value_anim = ngl.Translate(value_anim,
anim=ngl.AnimatedVec3(value_animkf),
label='%s value anim' % easing)
# Vertical time line
vline_data = array.array('f', (0, 0, 0, 0, graph_size, 0))
vline_vertices = ngl.BufferVec3(data=vline_data)
vline_geometry = ngl.Geometry(vline_vertices, topology='line_strip')
vline = ngl.Render(vline_geometry,
color_program,
label='%s time line' % easing)
vline.update_uniforms(color=line_ucolor)
# Time animation (v-line only)
time_x = -normed_graph_size / 2.
time_y = (-text_height - graph_size) / 2.
time_animkf = (ngl.AnimKeyFrameVec3(0, (time_x, time_y, 0)),
ngl.AnimKeyFrameVec3(
cfg.duration, (time_x + normed_graph_size, time_y, 0)))
time_anim = ngl.Translate(vline,
anim=ngl.AnimatedVec3(time_animkf),
label='%s time anim' % easing)
group = ngl.Group(label='%s block' % easing)
group.add_children(text, graph_block, normed_graph_block, curve,
value_anim, time_anim)
return group
def blending_and_stencil(cfg):
'''Scene using blending and stencil graphic features'''
cfg.duration = 5
random.seed(0)
fragment = cfg.get_frag('color')
program = ngl.Program(fragment=fragment)
circle = ngl.Circle(npoints=256)
cloud_color = ngl.UniformVec4(value=(1, 1, 1, 0.4))
main_group = ngl.Group()
quad = ngl.Quad((-1, -1, 0), (2, 0, 0), (0, 2, 0))
render = ngl.Render(quad, program, label='sky')
render.update_uniforms(color=ngl.UniformVec4(value=(0.2, 0.6, 1, 1)))
config = ngl.GraphicConfig(render,
stencil_test=True,
stencil_write_mask=0xFF,
stencil_func='always',
stencil_ref=1,
stencil_read_mask=0xFF,
stencil_fail='replace',
stencil_depth_fail='replace',
stencil_depth_pass='******')
main_group.add_children(config)
render = ngl.Render(circle, program, label='sun')
render.update_uniforms(color=ngl.UniformVec4(value=(1, 0.8, 0, 1)))
scale = ngl.Scale(render, (0.15, 0.15, 0.0))
translate = ngl.Translate(scale, (0.4, 0.3, 0))
main_group.add_children(translate)
cloud_group = ngl.Group(label='clouds')
centers = [
(-1.0, 0.85, 0.4),
(-0.5, 2.0, 1.0),
( 0, 0.85, 0.4),
( 1.0, 1.55, 0.8),
( 0.6, 0.65, 0.075),
( 0.5, 1.80, 1.25),
]
for center in centers:
render = ngl.Render(circle, program)
render.update_uniforms(color=cloud_color)
factor = random.random() * 0.4 + center[2]
keyframe = cfg.duration * (random.random() * 0.4 + 0.2)
animkf = (ngl.AnimKeyFrameVec3(0, (factor, factor, 0)),
ngl.AnimKeyFrameVec3(keyframe, (factor + 0.1, factor + 0.1, 0)),
ngl.AnimKeyFrameVec3(cfg.duration, (factor, factor, 0)))
scale = ngl.Scale(render, anim=ngl.AnimatedVec3(animkf))
translate = ngl.Translate(scale, vector=(center[0], center[1], 0))
cloud_group.add_children(translate)
config = ngl.GraphicConfig(cloud_group,
blend=True,
blend_src_factor='src_alpha',
blend_dst_factor='one_minus_src_alpha',
blend_src_factor_a='zero',
blend_dst_factor_a='one',
stencil_test=True,
stencil_write_mask=0x0,
stencil_func='equal',
stencil_ref=1,
stencil_read_mask=0xFF,
stencil_fail='keep',
stencil_depth_fail='keep',
stencil_depth_pass='******')
main_group.add_children(config)
camera = ngl.Camera(main_group)
camera.set_eye(0.0, 0.0, 2.0)
camera.set_center(0.0, 0.0, 0.0)
camera.set_up(0.0, 1.0, 0.0)
camera.set_orthographic(-cfg.aspect_ratio_float, cfg.aspect_ratio_float, -1.0, 1.0)
camera.set_clipping(1.0, 10.0)
return camera
if data is None:
_, v1, v2, _ = gen_floats(4)
return [key_cls(t0, v1), key_cls(t1, v2), key_cls(t2, v1)]
return [
key_cls(t0, data),
key_cls(t1, data[::-1]),
key_cls(t2, data),
]
FUNCS = dict(
animated_float=lambda data: ngl.AnimatedFloat(keyframes=_get_anim_kf(
ngl.AnimKeyFrameFloat, data)),
animated_vec2=lambda data: ngl.AnimatedVec2(keyframes=_get_anim_kf(
ngl.AnimKeyFrameVec2, data)),
animated_vec3=lambda data: ngl.AnimatedVec3(keyframes=_get_anim_kf(
ngl.AnimKeyFrameVec3, data)),
animated_vec4=lambda data: ngl.AnimatedVec4(keyframes=_get_anim_kf(
ngl.AnimKeyFrameVec4, data)),
animated_buffer_float=lambda data: ngl.AnimatedBufferFloat(
keyframes=_get_anim_kf(ngl.AnimKeyFrameBuffer, data)),
animated_buffer_vec2=lambda data: ngl.AnimatedBufferVec2(
keyframes=_get_anim_kf(ngl.AnimKeyFrameBuffer, data)),
animated_buffer_vec3=lambda data: ngl.AnimatedBufferVec3(
keyframes=_get_anim_kf(ngl.AnimKeyFrameBuffer, data)),
animated_buffer_vec4=lambda data: ngl.AnimatedBufferVec4(
keyframes=_get_anim_kf(ngl.AnimKeyFrameBuffer, data)),
animated_quat_mat4=lambda data: ngl.AnimatedQuat(
keyframes=_get_anim_kf(ngl.AnimKeyFrameQuat, data), as_mat4=True),
animated_quat_vec4=lambda data: ngl.AnimatedQuat(
keyframes=_get_anim_kf(ngl.AnimKeyFrameQuat, data), as_mat4=False),
array_float=lambda data: ngl.BufferFloat(data=data),