先决条件

pip install aspose-slides-foss

添加外部投影阴影

from aspose.slides_foss import ShapeType
from aspose.slides_foss.drawing import Color
import aspose.slides_foss as slides
from aspose.slides_foss.export import SaveFormat

with slides.Presentation() as prs:
    shape = prs.slides[0].shapes.add_auto_shape(
        ShapeType.RECTANGLE, 100, 100, 300, 120
    )
    shape.add_text_frame("Shadowed Shape")

    ef = shape.effect_format
    ef.enable_outer_shadow_effect()
    ef.outer_shadow_effect.blur_radius = 10       # softness in points
    ef.outer_shadow_effect.direction = 315        # 315° = upper-left
    ef.outer_shadow_effect.distance = 8           # offset in points
    ef.outer_shadow_effect.shadow_color.color = Color.from_argb(128, 0, 0, 0)

    prs.save("shadow.pptx", SaveFormat.PPTX)

常用 direction 值: 0=右, 45=右下, 90=下, 180=左, 270=上, 315=左上.

添加发光效果

from aspose.slides_foss import ShapeType
from aspose.slides_foss.drawing import Color
import aspose.slides_foss as slides
from aspose.slides_foss.export import SaveFormat

with slides.Presentation() as prs:
    shape = prs.slides[0].shapes.add_auto_shape(
        ShapeType.ELLIPSE, 150, 100, 250, 250
    )

    ef = shape.effect_format
    ef.enable_glow_effect()
    ef.glow_effect.radius = 20
    ef.glow_effect.color.color = Color.gold

    prs.save("glow.pptx", SaveFormat.PPTX)

应用高斯模糊

from aspose.slides_foss import ShapeType
import aspose.slides_foss as slides
from aspose.slides_foss.export import SaveFormat

with slides.Presentation() as prs:
    shape = prs.slides[0].shapes.add_auto_shape(
        ShapeType.RECTANGLE, 100, 100, 350, 180
    )
    shape.effect_format.set_blur_effect(radius=10, grow=True)

    prs.save("blur.pptx", SaveFormat.PPTX)

grow=True 将模糊区域扩展到形状边界之外；grow=False 将模糊限制在形状内部。

应用 3D 倒角

from aspose.slides_foss import ShapeType, BevelPresetType
import aspose.slides_foss as slides
from aspose.slides_foss.export import SaveFormat

with slides.Presentation() as prs:
    shape = prs.slides[0].shapes.add_auto_shape(
        ShapeType.RECTANGLE, 150, 150, 280, 120
    )
    shape.add_text_frame("3D Button")

    tdf = shape.three_d_format
    tdf.bevel_top.bevel_type = BevelPresetType.CIRCLE
    tdf.bevel_top.width = 12
    tdf.bevel_top.height = 6

    prs.save("bevel.pptx", SaveFormat.PPTX)

BevelPresetType 值: CIRCLE, RELAXED_INSET, COOL_SLANT, DIVOT, RIBLET, HARD_EDGE, SLOPE, CONVEX

3D 倒角与相机和灯光装置

from aspose.slides_foss import (
    ShapeType, BevelPresetType, CameraPresetType,
    LightRigPresetType, LightingDirection, MaterialPresetType,
)
import aspose.slides_foss as slides
from aspose.slides_foss.export import SaveFormat

with slides.Presentation() as prs:
    shape = prs.slides[0].shapes.add_auto_shape(
        ShapeType.RECTANGLE, 150, 150, 280, 120
    )
    shape.add_text_frame("Metal Button")

    tdf = shape.three_d_format
    tdf.bevel_top.bevel_type = BevelPresetType.CIRCLE
    tdf.bevel_top.width = 10
    tdf.bevel_top.height = 5
    tdf.camera.camera_type = CameraPresetType.PERSPECTIVE_ABOVE
    tdf.light_rig.light_type = LightRigPresetType.BALANCED
    tdf.light_rig.direction = LightingDirection.TOP
    tdf.material = MaterialPresetType.METAL
    tdf.depth = 20

    prs.save("3d-metal.pptx", SaveFormat.PPTX)

合并阴影和 3D 倒角

两个效果系统可以同时在同一形状上激活：

from aspose.slides_foss import (
    ShapeType, FillType, BevelPresetType,
    CameraPresetType, MaterialPresetType,
)
from aspose.slides_foss.drawing import Color
import aspose.slides_foss as slides
from aspose.slides_foss.export import SaveFormat

with slides.Presentation() as prs:
    shape = prs.slides[0].shapes.add_auto_shape(
        ShapeType.ROUND_CORNER_RECTANGLE, 150, 150, 320, 130
    )
    shape.add_text_frame("Premium Card")

    # Solid fill
    shape.fill_format.fill_type = FillType.SOLID
    shape.fill_format.solid_fill_color.color = Color.from_argb(255, 30, 80, 180)

    # 3D bevel
    tdf = shape.three_d_format
    tdf.bevel_top.bevel_type = BevelPresetType.CIRCLE
    tdf.bevel_top.width = 8
    tdf.camera.camera_type = CameraPresetType.PERSPECTIVE_ABOVE
    tdf.material = MaterialPresetType.PLASTIC

    # Drop shadow
    ef = shape.effect_format
    ef.enable_outer_shadow_effect()
    ef.outer_shadow_effect.blur_radius = 12
    ef.outer_shadow_effect.direction = 270
    ef.outer_shadow_effect.distance = 6
    ef.outer_shadow_effect.shadow_color.color = Color.from_argb(80, 0, 0, 0)

    prs.save("premium-card.pptx", SaveFormat.PPTX)

检查并删除效果

from aspose.slides_foss import ShapeType
import aspose.slides_foss as slides

with slides.Presentation() as prs:
    shape = prs.slides[0].shapes.add_auto_shape(
        ShapeType.RECTANGLE, 100, 100, 200, 100
    )
    ef = shape.effect_format

    ef.enable_outer_shadow_effect()
    ef.enable_glow_effect()
    print(f"Has effects: {not ef.is_no_effects}")  # True

    ef.disable_outer_shadow_effect()
    ef.disable_glow_effect()
    print(f"Has effects: {not ef.is_no_effects}")  # False

如何对形状应用 3D 效果和阴影