Aspose.3D FOSS
Java
Vertex Elements

Vertex Elements — Aspose.3D FOSS for Java

包：: com.aspose.threed (aspose-3d-foss 26.1.0)

VertexElement 是用于附加到 a 的每顶点（或每多边形、每边）数据层的抽象基类 Mesh.每个子类存储一种特定的几何属性——法线、UV 坐标、顶点颜色或平滑组。.

Example

Example

ClassDescription
VertexElementAbstract base for all vertex element types. Carries getMappingMode() , getReferenceMode() , and a data list.

VertexElementNormal

根据， 为每个顶点或每个多边形角存储一个法向量。 getMappingMode(). 数据值为 Vector4 实例具有 w 未使用。.

import com.aspose.threed.*;

VertexElement normals = mesh.createElement(
    VertexElementType.NORMAL,
    MappingMode.CONTROL_POINT,
    ReferenceMode.DIRECT
);

Example

ClassDescription
VertexElementNormalStores per-vertex or per-corner normal vectors as Vector4 (w unused).
VertexElementUVStores texture-coordinate pairs ( Vector2 ) per vertex or per polygon corner. A mesh may carry multiple UV layers.
VertexElementVertexColorStores per-vertex or per-corner RGBA colour data as Vector4 (r, g, b, a in 0–1 range).
VertexElementTangentStores tangent vectors for normal-map shading.
VertexElementBinormalStores binormal (bitangent) vectors, perpendicular to both the normal and the tangent.
VertexElementMaterialStores per-face material index references.

返回：VertexElementUV

存储纹理坐标对（Vector2）每个顶点或每个多边形角。网格可以携带多个 UV 层以用于不同的纹理通道。.


VertexElementUV uv = mesh.createElementUV(
    TextureMapping.DIFFUSE,
    MappingMode.POLYGON_VERTEX,
    ReferenceMode.INDEX_TO_DIRECT
);

Example

EnumerationDescription
VertexElementTypeSemantic role: NORMAL , UV , VERTEX_COLOR , TANGENT , BINORMAL , and others.
MappingModeControls which primitive a value maps to: CONTROL_POINT , POLYGON_VERTEX , or POLYGON .
ReferenceModeControls indexing: DIRECT or INDEX_TO_DIRECT .

VertexElementVertexColor

存储每顶点或每角的 RGBA 颜色数据，形式为 Vector4 （r、g、b、a 的范围在 0–1 之间）。.

Example

VertexElementType 枚举

标识顶点元素层的语义角色。.

import com.aspose.threed.*;

MappingMode 枚举

控制每个顶点元素值关联的几何基元。.

ReferenceMode 枚举

控制顶点元素数据数组的索引方式。.

Example 

import com.aspose.threed.Scene;
import com.aspose.threed.*;

Scene scene = Scene.fromFile("model.obj");

for (Node node : scene.getRootNode().getChildNodes()) {
    if (node.getEntity() instanceof Mesh) {
        Mesh mesh = (Mesh) node.getEntity();
        for (VertexElement ve : mesh.getVertexElements()) {
            System.out.println("  Element: " + ve.getVertexElementType()
                + " mapping=" + ve.getMappingMode()
                + " ref=" + ve.getReferenceMode());
        }
    }
}

另见

 中文