def transform_scale(cfg, factors=(0.7, 1.4, 0)):
cfg.aspect_ratio = (1, 1)
shape = _transform_shape(cfg)
return ngl.Scale(shape, factors)
def transform_scale_anchor(cfg, factors=(0.7, 1.4, 0),
anchor=(-0.4, 0.5, 0.7)):
cfg.aspect_ratio = (1, 1)
shape = _transform_shape(cfg)
return ngl.Scale(shape, factors, anchor=anchor)
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
def _get_live_trf_spec():
t0 = ngl.Identity()
t1 = ngl.Transform(t0)
t2 = ngl.Translate(t1)
t3 = ngl.Rotate(t2)
t4 = ngl.Scale(t3)
t5 = ngl.RotateQuat(t4)
t6 = ngl.Skew(t5)
return [
dict(
name="m4",
type="mat4",
category="single",
func=lambda data: ngl.UniformMat4(data, transform=t6),
livechange=(
# fmt: off
lambda: t1.set_matrix( # trf_step=1
0.1,
0.2,
0.0,
0.0,
0.0,
0.3,
0.4,
0.0,
0.0,
0.0,
0.5,
0.0,
0.8,
0.7,
0.0,
0.6,
),
lambda: t2.set_vector(0.2, 0.7, -0.4), # trf_step=2
lambda: t3.set_angle(123.4), # trf_step=3
lambda: t4.set_factors(0.7, 1.4, 0.2), # trf_step=4
lambda: t5.set_quat(0, 0, -0.474, 0.880), # trf_step=5
lambda: t6.set_angles(0, 50, -145), # trf_step=6
lambda: t6.set_angles(0, 0, 0),
lambda: t5.set_quat(0, 0, 0, 1),
lambda: t4.set_factors(1, 1, 1),
lambda: t3.set_angle(0),
lambda: t2.set_vector(0, 0, 0),
lambda: t1.set_matrix(
1.0,
0.0,
0.0,
0.0,
0.0,
1.0,
0.0,
0.0,
0.0,
0.0,
1.0,
0.0,
0.0,
0.0,
0.0,
1.0,
)
# fmt: on
),
),
]
def _get_random_compute(cfg, rng, t0, t1):
count = 10
vertex_shader = textwrap.dedent("""
void main()
{
vec4 position = vec4(ngl_position, 1.0) + vec4(pos.data[ngl_instance_index], 0.0, 0.0);
ngl_out_pos = ngl_projection_matrix * ngl_modelview_matrix * position;
var_tex0_coord = (tex0_coord_matrix * vec4(ngl_uvcoord, 0.0, 1.0)).xy;
}
""")
funcs = ("snake", "circle", "spread")
compute_shader = textwrap.dedent("""
#define TAU (2.0 * 3.14159265358979323846)
vec2 snake(float i)
{
return vec2(i * 2.0 - 1.0, sin((time + i) * TAU));
}
vec2 circle(float i)
{
float angle = (time + i) * TAU;
return vec2(sin(angle), cos(angle));
}
vec2 spread(float i)
{
float angle = i * TAU;
return vec2(sin(angle), cos(angle)) * (time + i);
}
void main()
{
uint wg = gl_WorkGroupID.x;
float i = float(wg) / float(gl_NumWorkGroups.x - 1U);
pos.data[wg] = FUNC(i);
}
""".replace("FUNC", rng.choice(funcs)))
pos = ngl.Block(fields=[ngl.BufferVec2(count=count, label="data")])
time_animkf = [ngl.AnimKeyFrameFloat(t0, 0), ngl.AnimKeyFrameFloat(t1, 1)]
compute_prog = ngl.ComputeProgram(compute_shader, workgroup_size=(1, 1, 1))
compute_prog.update_properties(pos=ngl.ResourceProps(writable=True))
compute = ngl.Compute(workgroup_count=(count, 1, 1), program=compute_prog)
compute.update_resources(time=ngl.AnimatedFloat(time_animkf), pos=pos)
geometry = _get_random_geometry(rng)
program = ngl.Program(vertex=vertex_shader,
fragment=cfg.get_frag("texture"))
program.update_vert_out_vars(var_tex0_coord=ngl.IOVec2())
render = ngl.Render(geometry,
program,
nb_instances=count,
blending="src_over")
render.update_frag_resources(tex0=_get_random_texture(cfg, rng))
render.update_vert_resources(pos=pos)
render = ngl.Scale(render, factors=(0.5, 0.5, 0))
return ngl.Group(children=(compute, render))
def _get_rtt_scene(cfg,
features='depth',
texture_ds_format=None,
samples=0,
mipmap_filter='none',
sample_depth=False):
cfg.duration = 10
cfg.aspect_ratio = (1, 1)
cube = _get_cube()
program = ngl.Program(vertex=_RENDER_CUBE_VERT, fragment=_RENDER_CUBE_FRAG)
program.update_vert_out_vars(var_normal=ngl.IOVec3())
render = ngl.Render(cube, program)
render = ngl.Scale(render, (0.5, 0.5, 0.5))
for i in range(3):
rot_animkf = ngl.AnimatedFloat([
ngl.AnimKeyFrameFloat(0, 0),
ngl.AnimKeyFrameFloat(cfg.duration, 360 * (i + 1))
])
axis = [int(i == x) for x in range(3)]
render = ngl.Rotate(render, axis=axis, anim=rot_animkf)
config = ngl.GraphicConfig(render, depth_test=True)
camera = ngl.Camera(
config,
eye=(0.0, 0.0, 3.0),
center=(0.0, 0.0, 0.0),
up=(0.0, 1.0, 0.0),
perspective=(45.0, cfg.aspect_ratio_float),
clipping=(1.0, 10.0),
)
size = 1024
texture_depth = None
if texture_ds_format:
texture_depth = ngl.Texture2D(width=size,
height=size,
format=texture_ds_format)
texture = ngl.Texture2D(
width=size,
height=size,
min_filter='linear',
mipmap_filter=mipmap_filter,
)
rtt = ngl.RenderToTexture(
camera,
[texture],
features=features,
depth_texture=texture_depth,
samples=samples,
clear_color=(0, 0, 0, 1),
)
quad = ngl.Quad((-1, -1, 0), (2, 0, 0), (0, 2, 0))
if sample_depth:
program = ngl.Program(vertex=cfg.get_vert('texture'),
fragment=_RENDER_DEPTH)
program.update_vert_out_vars(var_tex0_coord=ngl.IOVec2(),
var_uvcoord=ngl.IOVec2())
render = ngl.Render(quad, program)
render.update_frag_resources(tex0=texture_depth)
else:
program = ngl.Program(vertex=cfg.get_vert('texture'),
fragment=cfg.get_frag('texture'))
program.update_vert_out_vars(var_tex0_coord=ngl.IOVec2(),
var_uvcoord=ngl.IOVec2())
render = ngl.Render(quad, program)
render.update_frag_resources(tex0=texture)
return ngl.Group(children=(rtt, render))
def character_ttf(cfg):
"""The 'g' glyph from Noto Sans Black"""
cfg.duration = 5
keyframes = [
# fmt: off
ngl.PathKeyMove(to=(0.375912, 1, 0)),
ngl.PathKeyBezier2(control=(0.483577, 1, 0),
to=(0.550182, 0.972036, 0)),
ngl.PathKeyBezier2(control=(0.616788, 0.944073, 0),
to=(0.657847, 0.902736, 0)),
ngl.PathKeyLine(to=(0.665146, 0.902736, 0)),
ngl.PathKeyLine(to=(0.691606, 0.987842, 0)),
ngl.PathKeyLine(to=(1, 0.987842, 0)),
ngl.PathKeyLine(to=(1, 0.297872, 0)),
ngl.PathKeyBezier2(control=(1, 0.151976, 0),
to=(0.864051, 0.0759878, 0)),
ngl.PathKeyBezier2(control=(0.729015, 0, 0), to=(0.448905, 0, 0)),
ngl.PathKeyBezier2(control=(0.322993, 0, 0),
to=(0.22719, 0.00911854, 0)),
ngl.PathKeyBezier2(control=(0.132299, 0.0176292, 0),
to=(0.044708, 0.0401216, 0)),
ngl.PathKeyLine(to=(0.044708, 0.238298, 0)),
ngl.PathKeyBezier2(control=(0.138686, 0.212158, 0),
to=(0.222628, 0.199392, 0)),
ngl.PathKeyBezier2(control=(0.306569, 0.186018, 0),
to=(0.42792, 0.186018, 0)),
ngl.PathKeyBezier2(control=(0.643248, 0.186018, 0),
to=(0.643248, 0.288146, 0)),
ngl.PathKeyLine(to=(0.643248, 0.300304, 0)),
ngl.PathKeyBezier2(control=(0.643248, 0.33617, 0),
to=(0.654197, 0.386018, 0)),
ngl.PathKeyLine(to=(0.643248, 0.386018, 0)),
ngl.PathKeyBezier2(control=(0.605839, 0.345289, 0),
to=(0.541058, 0.316109, 0)),
ngl.PathKeyBezier2(control=(0.476277, 0.28693, 0),
to=(0.370438, 0.28693, 0)),
ngl.PathKeyBezier2(control=(0.205292, 0.28693, 0),
to=(0.10219, 0.377508, 0)),
ngl.PathKeyBezier2(control=(0, 0.468693, 0), to=(0, 0.642553, 0)),
ngl.PathKeyBezier2(control=(0, 0.817021, 0),
to=(0.104015, 0.908207, 0)),
ngl.PathKeyBezier2(control=(0.208942, 1, 0), to=(0.375912, 1, 0)),
ngl.PathKeyMove(to=(0.510036, 0.815805, 0)),
ngl.PathKeyBezier2(control=(0.362226, 0.815805, 0),
to=(0.362226, 0.638906, 0)),
ngl.PathKeyBezier2(control=(0.362226, 0.549544, 0),
to=(0.399635, 0.51003, 0)),
ngl.PathKeyBezier2(control=(0.437044, 0.471125, 0),
to=(0.515511, 0.471125, 0)),
ngl.PathKeyBezier2(control=(0.601277, 0.471125, 0),
to=(0.635949, 0.507599, 0)),
ngl.PathKeyBezier2(control=(0.67062, 0.544073, 0),
to=(0.67062, 0.617629, 0)),
ngl.PathKeyLine(to=(0.67062, 0.646201, 0)),
ngl.PathKeyBezier2(control=(0.67062, 0.72766, 0),
to=(0.637774, 0.771429, 0)),
ngl.PathKeyBezier2(control=(0.605839, 0.815805, 0),
to=(0.510036, 0.815805, 0)),
# fmt: on
]
path = ngl.Path(keyframes)
return ngl.Scale(_path_scene(cfg, path),
factors=(2, 2, 0),
anchor=(1, 1, 0))
def character_otf(cfg):
"""The 'g' glyph from Adobe Source Code Pro Black"""
cfg.duration = 5
keyframes = [
# fmt: off
ngl.PathKeyMove(to=(0.423713, 0, 0)),
ngl.PathKeyBezier3(control1=(0.775735, 0, 0),
control2=(1, 0.103331, 0),
to=(1, 0.253569, 0)),
ngl.PathKeyBezier3(control1=(1, 0.381373, 0),
control2=(0.856618, 0.434398, 0),
to=(0.608456, 0.434398, 0)),
ngl.PathKeyLine(to=(0.448529, 0.434398, 0)),
ngl.PathKeyBezier3(control1=(0.342831, 0.434398, 0),
control2=(0.301471, 0.445275, 0),
to=(0.301471, 0.476547, 0)),
ngl.PathKeyBezier3(control1=(0.301471, 0.495581, 0),
control2=(0.308824, 0.503739, 0),
to=(0.331801, 0.516655, 0)),
ngl.PathKeyBezier3(control1=(0.376838, 0.509857, 0),
control2=(0.41636, 0.507138, 0),
to=(0.450368, 0.507138, 0)),
ngl.PathKeyBezier3(control1=(0.673713, 0.507138, 0),
control2=(0.847426, 0.573759, 0),
to=(0.847426, 0.738273, 0)),
ngl.PathKeyBezier3(control1=(0.847426, 0.766145, 0),
control2=(0.83364, 0.793338, 0),
to=(0.820772, 0.810333, 0)),
ngl.PathKeyLine(to=(0.98989, 0.810333, 0)),
ngl.PathKeyLine(to=(0.98989, 0.983005, 0)),
ngl.PathKeyLine(to=(0.610294, 0.983005, 0)),
ngl.PathKeyBezier3(control1=(0.5625, 0.993882, 0),
control2=(0.506434, 1, 0),
to=(0.450368, 1, 0)),
ngl.PathKeyBezier3(control1=(0.231618, 1, 0),
control2=(0.0340074, 0.919103, 0),
to=(0.0340074, 0.746431, 0)),
ngl.PathKeyBezier3(control1=(0.0340074, 0.665534, 0),
control2=(0.0900735, 0.601632, 0),
to=(0.161765, 0.568321, 0)),
ngl.PathKeyLine(to=(0.161765, 0.562882, 0)),
ngl.PathKeyBezier3(control1=(0.0965074, 0.528892, 0),
control2=(0.0487132, 0.479266, 0),
to=(0.0487132, 0.431679, 0)),
ngl.PathKeyBezier3(control1=(0.0487132, 0.373215, 0),
control2=(0.0900735, 0.337186, 0),
to=(0.143382, 0.312033, 0)),
ngl.PathKeyLine(to=(0.143382, 0.306594, 0)),
ngl.PathKeyBezier3(control1=(0.0487132, 0.273283, 0),
control2=(0, 0.229776, 0),
to=(0, 0.172672, 0)),
ngl.PathKeyBezier3(control1=(0, 0.0475867, 0),
control2=(0.190257, 0, 0),
to=(0.423713, 0, 0)),
ngl.PathKeyMove(to=(0.450368, 0.648538, 0)),
ngl.PathKeyBezier3(control1=(0.387868, 0.648538, 0),
control2=(0.337316, 0.67981, 0),
to=(0.337316, 0.746431, 0)),
ngl.PathKeyBezier3(control1=(0.337316, 0.810333, 0),
control2=(0.387868, 0.840925, 0),
to=(0.450368, 0.840925, 0)),
ngl.PathKeyBezier3(control1=(0.511949, 0.840925, 0),
control2=(0.565257, 0.810333, 0),
to=(0.565257, 0.746431, 0)),
ngl.PathKeyBezier3(control1=(0.565257, 0.67981, 0),
control2=(0.511949, 0.648538, 0),
to=(0.450368, 0.648538, 0)),
ngl.PathKeyMove(to=(0.474265, 0.147519, 0)),
ngl.PathKeyBezier3(control1=(0.348346, 0.147519, 0),
control2=(0.261949, 0.167233, 0),
to=(0.261949, 0.211421, 0)),
ngl.PathKeyBezier3(control1=(0.261949, 0.231135, 0),
control2=(0.276654, 0.245411, 0),
to=(0.308824, 0.261727, 0)),
ngl.PathKeyBezier3(control1=(0.340993, 0.256288, 0),
control2=(0.378676, 0.253569, 0),
to=(0.452206, 0.253569, 0)),
ngl.PathKeyLine(to=(0.545956, 0.253569, 0)),
ngl.PathKeyBezier3(control1=(0.639706, 0.253569, 0),
control2=(0.693015, 0.248131, 0),
to=(0.693015, 0.211421, 0)),
ngl.PathKeyBezier3(control1=(0.693015, 0.172672, 0),
control2=(0.600184, 0.147519, 0),
to=(0.474265, 0.147519, 0)),
# fmt: on
]
path = ngl.Path(keyframes)
return ngl.Scale(_path_scene(cfg, path),
factors=(2, 2, 0),
anchor=(1, 1, 0))
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
