Texture Paint a straight Line using Python

Question

Refactoring this post to simplify the request:

I need to draw a straight line/continuous Stroke in Python with Texture Paint. Unfortunately it is currently only placing a single dot at either end of the stroke.

Desired Outcome:

Current Code does this:

Tried:

• Using "location" & "mouse_event" instead of mouse
• Making "name" unique
• Using different Stroke settings in Texture Paint (like Line)
• UV unwrapping
• Every combination of "is_start" for each stroke

I've seen multiple posts about this with no solutions, is bpy.ops.paint.image_paint just broken?

Code:

import bpy

x1 = 500
x2 = 800
# the line should be horizontal, ie 500-800px

strokes = [{"name": "",
    "is_start": True,
    "location": (0,0,0),
    "mouse":(x1, 500),
    "mouse_event":(0,0),
    "pen_flip":False,
    "pressure":1.0,
    "size":10,
    "time":0,
    "x_tilt":0.0,
    "y_tilt":0.0}, 

    {"name": "",
    "is_start": False,
    "location": (0,0,0),
    "mouse":(x2, 500),
    "mouse_event":(0,0),
    "pen_flip":False,
    "pressure":1.0,
    "size":10,
    "time":0,
    "x_tilt":0.0,
    "y_tilt":0.0}]  
    
bpy.ops.object.mode_set(mode='TEXTURE_PAINT')

areas  = [area for area in bpy.context.window.screen.areas if area.type == 'VIEW_3D']

with bpy.context.temp_override(
    window=bpy.context.window,
    area=areas[0],
    region=[region for region in areas[0].regions if region.type == 'WINDOW'][0],
    screen=bpy.context.window.screen
):
    bpy.ops.paint.brush_select(vertex_tool="DRAW", toggle=False)
    bpy.ops.paint.image_paint(stroke=strokes)

Answer 1

I think it's not the way it works where we expected it to fill the gap. You have to manually define the points where a stroke will be applied:

import bpy

points = []

for i in range(0,800):
    points.append((i*6,500))

strokes = []
for i, point in enumerate(points):
    stroke = {
        "name": "",
        "is_start": True,
        "location": (0, 0, 0),
        "mouse": point,
        "mouse_event": (0, 0),
        "pen_flip": False,
        "pressure": 1.0,
        "size": 10,
        "time": 0,
        "x_tilt": 0.0,
        "y_tilt": 0.0
    }
    strokes.append(stroke)

bpy.ops.object.mode_set(mode='TEXTURE_PAINT')

areas  = [area for area in bpy.context.window.screen.areas if area.type == 'VIEW_3D']

with bpy.context.temp_override(
    window=bpy.context.window,
    area=areas[0],
    region=[region for region in areas[0].regions if region.type == 'WINDOW'][0],
    screen=bpy.context.window.screen
):
    bpy.ops.paint.brush_select(image_tool="DRAW", toggle=False)
    bpy.ops.paint.image_paint(stroke=strokes)