Points

Quick documentation

DefinitionCode example

Points are discs with a given size (diameter) and posses a surface that can be filled and stroked. They always face the viewer such that their rendered shape is a disc, independentely of any transform.

import numpy as np
import matplotlib.pyplot as plt
from gsp import glm, core, visual, transform

canvas = core.Canvas(512, 512, 100.0)
viewport = core.Viewport(canvas,0,0,512,512)
camera = glm.Camera("ortho")

n = 600
P = glm.vec3(n)
P.x = np.linspace(0.05,0.95,n)
P.xy = np.linspace(0,10.125*2*np.pi,n)
sizes = np.linspace(0.05, 12.0,n)**2
points = visual.Points(P, sizes)
points.render(viewport, camera.transform)
plt.show()

init

__init__(
    positions,
    sizes=25.0,
    fill_colors=Color(0, 0, 0, 1),
    line_colors=Color(0, 0, 0, 1),
    line_widths=0,
)

Create a visual of n points at given positions with given sizes, flll_colors., line_colors and line_widths.

Parameters:

Name	Type	Description	Default
`positions`	`Transform \| Buffer`	Points position (vec3)	required
`sizes`	`Transform \| Buffer \| Measure`	Point sizes (float)	`25.0`
`fill_colors`	`Transform \| Buffer \| Color`	Points fill colors (vec4)	`Color(0, 0, 0, 1)`
`line_colors`	`Transform \| Buffer \| Color`	Points line colors (vec4)	`Color(0, 0, 0, 1)`
`line_widths`	`Transform \| Buffer \| Measure`	Points line colors (vec4)	`0`

render

render(viewport=None, model=None, view=None, proj=None)

Render the visual on viewport using the given model, view, proj matrices

Parameters:

Name	Type	Description	Default
`viewport`	`Viewport`	Viewport where to render the visual	`None`
`model`	`mat4`	Model matrix to use for rendering	`None`
`view`	`mat4`	View matrix to use for rendering	`None`
`proj`	`mat4`	Projection matrix to use for rendering	`None`