def data_mat_iovars(cfg):
cfg.aspect_ratio = (1, 1)
vert = textwrap.dedent("""\
void main()
{
ngl_out_pos = ngl_projection_matrix * ngl_modelview_matrix * vec4(ngl_position, 1.0);
var_mat3 = mat3(1.0);
var_mat4 = mat4(1.0);
var_vec4 = vec4(1.0, 0.5, 0.0, 1.0);
}
""")
frag = textwrap.dedent("""\
void main()
{
ngl_out_color = mat4(var_mat3) * var_mat4 * var_vec4;
}
""")
program = ngl.Program(vertex=vert, fragment=frag)
program.update_vert_out_vars(
var_mat3=ngl.IOMat3(),
var_mat4=ngl.IOMat4(),
var_vec4=ngl.IOVec4(),
)
geometry = ngl.Quad(corner=(-1, -1, 0), width=(2, 0, 0), height=(0, 2, 0))
render = ngl.Render(geometry, program)
return render
def triangle(cfg, size=0.5):
'''Rotating triangle with edge coloring specified in a vertex attribute'''
b = size * math.sqrt(3) / 2.0
c = size * 1 / 2.
cfg.duration = 3.
cfg.aspect_ratio = (1, 1)
colors_data = array.array(
'f', [0.0, 0.0, 1.0, 1.0, 0.0, 1.0, 0.0, 1.0, 1.0, 0.0, 0.0, 1.0])
colors_buffer = ngl.BufferVec4(data=colors_data)
triangle = ngl.Triangle((-b, -c, 0), (b, -c, 0), (0, size, 0))
p = ngl.Program(fragment=cfg.get_frag('color'),
vertex=cfg.get_vert('triangle'))
p.update_vert_out_vars(color=ngl.IOVec4())
node = ngl.Render(triangle, p)
node.update_attributes(edge_color=colors_buffer)
animkf = [
ngl.AnimKeyFrameFloat(0, 0),
ngl.AnimKeyFrameFloat(cfg.duration / 3., -360 / 3., 'exp_in_out'),
ngl.AnimKeyFrameFloat(2 * cfg.duration / 3., -2 * 360 / 3.,
'exp_in_out'),
ngl.AnimKeyFrameFloat(cfg.duration, -360, 'exp_in_out')
]
node = ngl.Rotate(node, anim=ngl.AnimatedFloat(animkf))
return node
def _data_vertex_and_fragment_blocks(cfg, layout):
"""
This test ensures that the block bindings are properly set by pgcraft
when UBOs or SSBOs are bound to different stages.
"""
cfg.aspect_ratio = (1, 1)
src = ngl.Block(
fields=[
ngl.UniformVec3(value=COLORS.red, label="color"),
ngl.UniformFloat(value=0.5, label="opacity"),
],
layout="std140",
)
dst = ngl.Block(
fields=[
ngl.UniformVec3(value=COLORS.white, label="color"),
],
layout=layout,
)
vert = textwrap.dedent("""\
void main()
{
ngl_out_pos = ngl_projection_matrix * ngl_modelview_matrix * vec4(ngl_position, 1.0);
var_src = vec4(src.color, 1.0) * src.opacity;
}
""")
frag = textwrap.dedent("""\
void main()
{
vec3 color = var_src.rgb + (1.0 - var_src.a) * dst.color;
ngl_out_color = vec4(color, 1.0);
}
""")
program = ngl.Program(vertex=vert, fragment=frag)
program.update_vert_out_vars(var_src=ngl.IOVec4(), )
geometry = ngl.Quad(corner=(-1, -1, 0), width=(2, 0, 0), height=(0, 2, 0))
render = ngl.Render(geometry, program)
render.update_vert_resources(src=src)
render.update_frag_resources(dst=dst)
return render
def shape_precision_iovar(cfg):
cfg.aspect_ratio = (1, 1)
vert = textwrap.dedent("""\
void main()
{
ngl_out_pos = ngl_projection_matrix * ngl_modelview_matrix * vec4(ngl_position, 1.0);
color = vec4((ngl_out_pos.xy + 1.0) * .5, 1.0 - (ngl_out_pos.x + 1.0) * .5 - (ngl_out_pos.y + 1.0) * .5, 1.0);
}
""")
frag = textwrap.dedent("""\
void main()
{
ngl_out_color = color;
}
""")
program = ngl.Program(vertex=vert, fragment=frag)
program.update_vert_out_vars(
color=ngl.IOVec4(precision_out="high", precision_in="low"))
geometry = ngl.Quad(corner=(-1, -1, 0), width=(2, 0, 0), height=(0, 2, 0))
scene = ngl.Render(geometry, program)
return scene