mirror of
https://github.com/xiaoqidun/ofdgo.git
synced 2026-10-30 01:27:26 +08:00
565 lines
19 KiB
Go
565 lines
19 KiB
Go
// Copyright 2025-2026 肖其顿 (XIAO QI DUN)
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
package ofdgo
|
|
|
|
import (
|
|
"context"
|
|
"fmt"
|
|
"image"
|
|
"math"
|
|
)
|
|
|
|
// U3DCamera 定义沿正Z方向观察的相机，ScaleX和ScaleY为投影到像素的倍率
|
|
// ToWorld按列存储，全零表示单位矩阵；Far为0且ClipFar为假时不设置远裁剪面
|
|
// ShiftX和ShiftY为投影原点相对视口中心的像素偏移，向右及向下为正
|
|
type U3DCamera struct {
|
|
ToWorld [16]float64
|
|
Perspective bool
|
|
ScaleX, ScaleY, Near, Far float64
|
|
ShiftX, ShiftY float64
|
|
ClipFar bool
|
|
}
|
|
|
|
// U3DRenderOptions 控制静态绘制，指定Camera时使用整个输出视口
|
|
// Camera为空时使用View指定的节点或首个视图节点，Instance指定其父路径实例
|
|
// Lighting为空时沿用模型灯光，非空时替换全部模型灯光
|
|
// Opacity为空时沿用着色器混合，非空时叠加面片、着色边点及包围盒轮廓的透明度
|
|
// 纹理合成后先应用节点透明度，再应用Opacity
|
|
// Mode控制绘制方式，AuxiliaryColor用于固定颜色的边点，FaceColor用于包围盒面及插图面，空值分别使用黑色和背景色
|
|
// CreaseAngle为轮廓夹角，单位为度，空值使用45；着色插图以漫反射色的1/4补充自发光
|
|
// Nodes按名称覆盖节点，重复名称使用最后一项，每次绘制均从原场景开始
|
|
// Time以秒指定动画采样时刻，零值为初始时刻，不随实际时钟推进
|
|
// ResolveTexture提供外部纹理，空值不访问外部资源；回调自身的内存与超时由调用方控制
|
|
// Background为空时使用白色；缓存与实例上限为0时分别使用256MiB和65536，不含输入及运行时开销
|
|
type U3DRenderOptions struct {
|
|
Width, Height int
|
|
View string
|
|
Instance int
|
|
Camera *U3DCamera
|
|
Background *[3]float64
|
|
Lighting *U3DLighting
|
|
Opacity *float64
|
|
Mode U3DRenderMode
|
|
AuxiliaryColor *[3]float64
|
|
FaceColor *[3]float64
|
|
CreaseAngle *float64
|
|
Nodes []U3DNodeState
|
|
Time float64
|
|
Sections []U3DCrossSection
|
|
ResolveTexture U3DTextureResolver
|
|
MaxMemoryBytes int64
|
|
MaxInstances int
|
|
}
|
|
|
|
// u3dPixel 保存不透明底色、最近深度及透明片元链
|
|
type u3dPixel struct {
|
|
color [3]float64
|
|
depth float64
|
|
order uint64
|
|
head int32
|
|
}
|
|
|
|
// u3dFragment 保存等待按像素深度混合的透明或非覆盖片元
|
|
type u3dFragment struct {
|
|
color [4]float64
|
|
depth float64
|
|
order uint64
|
|
blend uint32
|
|
next int32
|
|
}
|
|
|
|
// u3dRender 保存一次绘制的有限预算，不修改调用方场景
|
|
type u3dRender struct {
|
|
ctx context.Context
|
|
model *U3DModel
|
|
remaining uint64
|
|
frame []u3dPixel
|
|
output *image.RGBA
|
|
viewport [4]float64
|
|
camera U3DCamera
|
|
toCamera u3dMatrix
|
|
scene []u3dInstance
|
|
byNode [][]int
|
|
connected []bool
|
|
members []bool
|
|
meshes, shaders, materials, lightIndex map[string]int
|
|
textureIndex map[string]int
|
|
viewIndex, motionIndex map[string]int
|
|
textures map[string]*image.NRGBA64
|
|
textureSets map[[8]*U3DTextureLayer]*u3dTextureSet
|
|
resolveTexture U3DTextureResolver
|
|
view *U3DView
|
|
lights []u3dRenderLight
|
|
lighting *U3DLighting
|
|
opacity float64
|
|
mode U3DRenderMode
|
|
creaseAngle float64
|
|
auxiliaryColor, faceColor [3]float64
|
|
depthOnly bool
|
|
primitives map[u3dPrimitiveKey]struct{}
|
|
texturedPrimitives map[u3dTexturedPrimitiveKey]struct{}
|
|
states map[string]U3DNodeState
|
|
posed map[string]*U3DMesh
|
|
animated map[string]u3dAnimationState
|
|
sections []u3dSection
|
|
sectionScratch [2][]u3dVertex
|
|
chunks [][]u3dFragment
|
|
fragments int
|
|
scratch []int
|
|
order uint64
|
|
}
|
|
|
|
// RenderU3D 绘制几何及视图纹理层，返回指定时刻的不透明图像，不执行脚本
|
|
// 可通过节点覆盖指定动作轨道与采样时间，逐次生成独立姿态，不修改原模型
|
|
// 显式骨骼姿态按权重变换位置和法线，暂不生成骨骼链接或推导缺失权重
|
|
// 动画修饰器支持单动作的节点和骨骼求值，尚未实现的动作衔接返回明确错误
|
|
// 几何纹理支持模型坐标与程序化映射，参考形状约定见U3DTextureLayer
|
|
// 纹理按需解码并复用，不自动访问外部图像
|
|
// 采用逐顶点光照及逐像素深度混合，空名称引用标准默认资源
|
|
// 缺失几何、材质和着色器采用默认资源，缺失的非空光源引用不产生光照
|
|
// 缺失纹理返回错误，空纹理名称使用标准默认图像
|
|
// 仅绘制默认根的后代，非空父节点引用缺失时不展开该父路径
|
|
// 入参: ctx 取消上下文, model 场景, options 视图、输出与资源限制
|
|
// 返回: *image.RGBA 图像, error 参数、能力、预算或取消错误
|
|
func RenderU3D(ctx context.Context, model *U3DModel, options U3DRenderOptions) (*image.RGBA, error) {
|
|
r, err := newU3DRender(ctx, model, options)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
passes, err := r.selectView(options)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
return r.render(options, passes)
|
|
}
|
|
|
|
// newU3DRender 建立有预算限制的场景实例与资源索引
|
|
// 入参: ctx 取消上下文, model 场景, options 输出与资源限制, states 后续节点覆盖分组
|
|
// 返回: *u3dRender 绘制状态, error 参数、场景、预算或取消错误
|
|
func newU3DRender(ctx context.Context, model *U3DModel, options U3DRenderOptions, states ...[]U3DNodeState) (*u3dRender, error) {
|
|
if ctx == nil || model == nil || options.Width <= 0 || options.Height <= 0 || options.MaxMemoryBytes < 0 || options.MaxInstances < 0 || options.Instance < 0 || !finite(options.Time) {
|
|
return nil, fmt.Errorf("invalid U3D render options")
|
|
}
|
|
limit := options.MaxMemoryBytes
|
|
if limit == 0 {
|
|
limit = u3dDefaultBytes
|
|
}
|
|
r := &u3dRender{ctx: ctx, model: model, remaining: uint64(limit), opacity: -1, mode: options.Mode, creaseAngle: 45, resolveTexture: options.ResolveTexture}
|
|
if options.Mode > U3DRenderShadedIllustration {
|
|
return nil, fmt.Errorf("unsupported U3D render mode")
|
|
}
|
|
if options.CreaseAngle != nil {
|
|
if !finite(*options.CreaseAngle) {
|
|
return nil, fmt.Errorf("invalid U3D crease angle")
|
|
}
|
|
r.creaseAngle = *options.CreaseAngle
|
|
}
|
|
if options.Opacity != nil {
|
|
value := *options.Opacity
|
|
if !finite(value) || value < 0 || value > 1 {
|
|
return nil, fmt.Errorf("invalid U3D render opacity")
|
|
}
|
|
r.opacity = value
|
|
}
|
|
if uint64(options.Width) > uint64(^uint(0)>>1)/uint64(options.Height) {
|
|
return nil, fmt.Errorf("invalid U3D render dimensions")
|
|
}
|
|
pixels := uint64(options.Width) * uint64(options.Height)
|
|
if err := r.reserve(pixels, 60); err != nil {
|
|
return nil, err
|
|
}
|
|
if err := r.resources(); err != nil {
|
|
return nil, err
|
|
}
|
|
order, index, err := r.sceneGraph()
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
if err := r.checkAnimations(); err != nil {
|
|
return nil, err
|
|
}
|
|
maxInstances := options.MaxInstances
|
|
if maxInstances == 0 {
|
|
maxInstances = 65536
|
|
}
|
|
groups := append([][]U3DNodeState{options.Nodes}, states...)
|
|
if err := r.nodeStates(groups...); err != nil {
|
|
return nil, err
|
|
}
|
|
if err := r.prepareAnimations(options.Time); err != nil {
|
|
return nil, err
|
|
}
|
|
if err := r.instances(order, index, maxInstances); err != nil {
|
|
return nil, err
|
|
}
|
|
if err := r.poseNodes(); err != nil {
|
|
return nil, err
|
|
}
|
|
if err := r.reserve(uint64(len(r.scene)), 1); err != nil {
|
|
return nil, err
|
|
}
|
|
r.members = make([]bool, len(r.scene))
|
|
return r, nil
|
|
}
|
|
|
|
// render 在已选择的相机和轮次下生成图像
|
|
// 入参: options 输出与灯光背景, passes 绘制轮次
|
|
// 返回: *image.RGBA 图像, error 参数、绘制、预算或取消错误
|
|
func (r *u3dRender) render(options U3DRenderOptions, passes []U3DViewPass) (*image.RGBA, error) {
|
|
if r.sections == nil {
|
|
if err := r.prepareSections(options.Sections); err != nil {
|
|
return nil, err
|
|
}
|
|
}
|
|
if err := r.overrideLighting(options.Lighting); err != nil {
|
|
return nil, err
|
|
}
|
|
background := [3]float64{1, 1, 1}
|
|
if options.Background != nil {
|
|
background = *options.Background
|
|
}
|
|
for i, v := range background {
|
|
if !finite(v) {
|
|
return nil, fmt.Errorf("invalid U3D background")
|
|
}
|
|
background[i] = min(1, max(0, v))
|
|
}
|
|
r.faceColor = background
|
|
for _, item := range []struct {
|
|
source *[3]float64
|
|
target *[3]float64
|
|
}{{options.AuxiliaryColor, &r.auxiliaryColor}, {options.FaceColor, &r.faceColor}} {
|
|
if item.source != nil {
|
|
for i, value := range *item.source {
|
|
if !finite(value) || value < 0 || value > 1 {
|
|
return nil, fmt.Errorf("invalid U3D mode color")
|
|
}
|
|
item.target[i] = value
|
|
}
|
|
}
|
|
}
|
|
r.frame = make([]u3dPixel, options.Width*options.Height)
|
|
r.output = image.NewRGBA(image.Rect(0, 0, options.Width, options.Height))
|
|
for i := range r.frame {
|
|
if i%4096 == 0 {
|
|
if err := r.ctx.Err(); err != nil {
|
|
return nil, err
|
|
}
|
|
}
|
|
r.frame[i].color = background
|
|
}
|
|
if r.view != nil {
|
|
if err := r.viewLayers(r.view.Backdrops); err != nil {
|
|
return nil, err
|
|
}
|
|
}
|
|
for passIndex, pass := range passes {
|
|
if err := r.renderPass(pass, passIndex, passIndex == len(passes)-1); err != nil {
|
|
return nil, err
|
|
}
|
|
}
|
|
if r.view != nil {
|
|
if err := r.viewLayers(r.view.Overlays); err != nil {
|
|
return nil, err
|
|
}
|
|
}
|
|
for i, pixel := range r.frame {
|
|
if i%4096 == 0 {
|
|
if err := r.ctx.Err(); err != nil {
|
|
return nil, err
|
|
}
|
|
}
|
|
for component, v := range pixel.color {
|
|
r.output.Pix[i*4+component] = byte(math.Round(min(1, max(0, v)) * 255))
|
|
}
|
|
r.output.Pix[i*4+3] = 255
|
|
}
|
|
if err := r.ctx.Err(); err != nil {
|
|
return nil, err
|
|
}
|
|
return r.output, nil
|
|
}
|
|
|
|
// reserve 在分配绘制缓存前扣减预算并检查取消状态
|
|
// 入参: count 元素数量, size 元素预算
|
|
// 返回: error 预算或取消错误
|
|
func (r *u3dRender) reserve(count, size uint64) error {
|
|
if err := r.ctx.Err(); err != nil {
|
|
return err
|
|
}
|
|
if size == 0 || count > r.remaining/size || count > uint64(^uint(0)>>1)/size {
|
|
return fmt.Errorf("U3D render memory exceeds limit")
|
|
}
|
|
r.remaining -= count * size
|
|
return nil
|
|
}
|
|
|
|
// selectView 解析视图与相机覆盖，内部视口使用左上角坐标
|
|
// 入参: options 绘制选项
|
|
// 返回: []U3DViewPass 绘制轮次, error 视图或投影错误
|
|
func (r *u3dRender) selectView(options U3DRenderOptions) ([]U3DViewPass, error) {
|
|
r.view = nil
|
|
r.viewport = [4]float64{0, 0, float64(options.Width), float64(options.Height)}
|
|
selected := -1
|
|
for i, node := range r.model.Nodes {
|
|
if i%256 == 0 {
|
|
if err := r.ctx.Err(); err != nil {
|
|
return nil, err
|
|
}
|
|
}
|
|
if options.View != "" && node.Name == options.View || options.View == "" && options.Camera == nil && node.Kind == "View" {
|
|
selected = i
|
|
break
|
|
}
|
|
}
|
|
if options.View != "" && selected < 0 {
|
|
return nil, fmt.Errorf("missing U3D view %q", options.View)
|
|
}
|
|
passes := []U3DViewPass{{}}
|
|
if selected >= 0 {
|
|
node := r.model.Nodes[selected]
|
|
if node.Kind != "View" || node.View == nil {
|
|
return nil, fmt.Errorf("invalid U3D view node")
|
|
}
|
|
view := node.View
|
|
if view.Attributes & ^uint32(7) != 0 {
|
|
return nil, fmt.Errorf("invalid U3D view attributes")
|
|
}
|
|
r.view = view
|
|
if i, exists := r.viewIndex[node.Resource]; exists {
|
|
passes = r.model.Views[i].Passes
|
|
}
|
|
if options.Camera == nil {
|
|
if options.Instance >= len(r.byNode[selected]) {
|
|
return nil, fmt.Errorf("missing U3D camera instance")
|
|
}
|
|
r.camera.ToWorld = r.scene[r.byNode[selected][options.Instance]].world
|
|
if view.Attributes & ^uint32(7) != 0 || view.Attributes&6 >= 4 {
|
|
return nil, fmt.Errorf("unsupported U3D view projection")
|
|
}
|
|
for i, v := range view.Viewport {
|
|
if !finite(float64(v)) {
|
|
return nil, fmt.Errorf("invalid U3D viewport")
|
|
}
|
|
r.viewport[(i+2)%4] = float64(v)
|
|
}
|
|
if view.Attributes&1 != 0 {
|
|
r.viewport[0] *= float64(options.Width)
|
|
r.viewport[1] *= float64(options.Height)
|
|
r.viewport[2] *= float64(options.Width)
|
|
r.viewport[3] *= float64(options.Height)
|
|
}
|
|
if r.viewport[2] <= 0 || r.viewport[3] <= 0 {
|
|
return nil, fmt.Errorf("invalid U3D viewport size")
|
|
}
|
|
r.camera.Near, r.camera.Far = float64(view.Near), float64(view.Far)
|
|
if r.camera.Far <= r.camera.Near {
|
|
return nil, fmt.Errorf("invalid U3D view clipping range")
|
|
}
|
|
r.camera.Perspective = view.Attributes&6 == 0
|
|
if r.camera.Perspective {
|
|
if view.Projection <= 0 || view.Projection >= 180 {
|
|
return nil, fmt.Errorf("invalid U3D perspective field of view")
|
|
}
|
|
r.camera.ScaleY = r.viewport[3] / (2 * math.Tan(float64(view.Projection)*math.Pi/360))
|
|
} else {
|
|
if view.Projection <= 0 {
|
|
return nil, fmt.Errorf("invalid U3D orthographic height")
|
|
}
|
|
r.camera.ScaleY = r.viewport[3] / float64(view.Projection)
|
|
}
|
|
r.camera.ScaleX = r.camera.ScaleY
|
|
}
|
|
}
|
|
if options.Camera != nil {
|
|
r.camera = *options.Camera
|
|
} else if selected < 0 {
|
|
return nil, fmt.Errorf("missing U3D camera")
|
|
}
|
|
if len(passes) > 32 {
|
|
return nil, fmt.Errorf("unsupported U3D render pass count")
|
|
}
|
|
for _, v := range []float64{r.camera.ScaleX, r.camera.ScaleY, r.camera.Near, r.camera.Far, r.camera.ShiftX, r.camera.ShiftY} {
|
|
if !finite(v) {
|
|
return nil, fmt.Errorf("invalid U3D camera values")
|
|
}
|
|
}
|
|
if r.camera.ScaleX <= 0 || r.camera.ScaleY <= 0 || r.camera.Perspective && r.camera.Near <= 0 || (r.camera.ClipFar || r.camera.Far != 0) && r.camera.Far < r.camera.Near {
|
|
return nil, fmt.Errorf("invalid U3D camera projection")
|
|
}
|
|
matrix := u3dMatrix(r.camera.ToWorld)
|
|
if matrix == (u3dMatrix{}) {
|
|
matrix = u3dIdentity()
|
|
}
|
|
var ok bool
|
|
r.toCamera, ok = matrix.inverse()
|
|
if !ok {
|
|
return nil, fmt.Errorf("invalid U3D camera transform")
|
|
}
|
|
return passes, nil
|
|
}
|
|
|
|
// resources 建立只读资源索引，空名称保留给标准默认资源
|
|
// 返回: error 名称、预算或取消错误
|
|
func (r *u3dRender) resources() error {
|
|
count := uint64(len(r.model.Meshes)) + uint64(len(r.model.Shaders)) + uint64(len(r.model.Materials)) + uint64(len(r.model.Lights)) + uint64(len(r.model.Textures)) + uint64(len(r.model.Views)) + uint64(len(r.model.Motions))
|
|
if err := r.reserve(count, 96); err != nil {
|
|
return err
|
|
}
|
|
r.meshes = make(map[string]int, len(r.model.Meshes))
|
|
r.shaders = make(map[string]int, len(r.model.Shaders))
|
|
r.materials = make(map[string]int, len(r.model.Materials))
|
|
r.lightIndex = make(map[string]int, len(r.model.Lights))
|
|
r.textureIndex = make(map[string]int, len(r.model.Textures))
|
|
r.viewIndex = make(map[string]int, len(r.model.Views))
|
|
r.motionIndex = make(map[string]int, len(r.model.Motions))
|
|
add := func(index map[string]int, name string, i int) error {
|
|
if i%256 == 0 {
|
|
if err := r.ctx.Err(); err != nil {
|
|
return err
|
|
}
|
|
}
|
|
if name == "" {
|
|
return fmt.Errorf("cannot redefine U3D default resource")
|
|
}
|
|
if _, ok := index[name]; ok {
|
|
return fmt.Errorf("duplicate U3D render resource %q", name)
|
|
}
|
|
index[name] = i
|
|
return nil
|
|
}
|
|
for i, v := range r.model.Meshes {
|
|
if err := add(r.meshes, v.Name, i); err != nil {
|
|
return err
|
|
}
|
|
}
|
|
for i, v := range r.model.Shaders {
|
|
if err := add(r.shaders, v.Name, i); err != nil {
|
|
return err
|
|
}
|
|
}
|
|
for i, v := range r.model.Materials {
|
|
if err := add(r.materials, v.Name, i); err != nil {
|
|
return err
|
|
}
|
|
}
|
|
for i, v := range r.model.Lights {
|
|
if err := add(r.lightIndex, v.Name, i); err != nil {
|
|
return err
|
|
}
|
|
}
|
|
for i, v := range r.model.Textures {
|
|
if err := add(r.textureIndex, v.Name, i); err != nil {
|
|
return err
|
|
}
|
|
}
|
|
for i, v := range r.model.Views {
|
|
if err := add(r.viewIndex, v.Name, i); err != nil {
|
|
return err
|
|
}
|
|
}
|
|
for i, v := range r.model.Motions {
|
|
if err := add(r.motionIndex, v.Name, i); err != nil {
|
|
return err
|
|
}
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// renderPass 分别解析遮挡与混合，绘制轮次之间保留颜色并重置深度
|
|
// 入参: pass 轮次参数, passIndex 轮次索引, last 是否为最后一轮
|
|
// 返回: error 场景、预算或取消错误
|
|
func (r *u3dRender) renderPass(pass U3DViewPass, passIndex int, last bool) error {
|
|
if pass.Attributes > 1 || pass.FogMode > 2 {
|
|
return fmt.Errorf("invalid U3D render pass")
|
|
}
|
|
if pass.Attributes&1 != 0 {
|
|
for _, v := range append(pass.FogColor[:], pass.FogNear, pass.FogFar) {
|
|
if !finite(float64(v)) {
|
|
return fmt.Errorf("invalid U3D fog value")
|
|
}
|
|
}
|
|
if pass.FogMode == 0 && pass.FogFar <= pass.FogNear || pass.FogMode != 0 && pass.FogFar <= 0 {
|
|
return fmt.Errorf("invalid U3D fog range")
|
|
}
|
|
}
|
|
for i, instance := range r.scene {
|
|
if i%256 == 0 {
|
|
if err := r.ctx.Err(); err != nil {
|
|
return err
|
|
}
|
|
}
|
|
r.members[i] = pass.Root == "" || r.model.Nodes[instance.node].Name == pass.Root || instance.parent >= 0 && r.members[instance.parent]
|
|
}
|
|
for i := range r.frame {
|
|
if i%4096 == 0 {
|
|
if err := r.ctx.Err(); err != nil {
|
|
return err
|
|
}
|
|
}
|
|
r.frame[i].depth = math.Inf(1)
|
|
r.frame[i].order = 0
|
|
r.frame[i].head = -1
|
|
}
|
|
r.fragments = 0
|
|
if r.mode.shaded() {
|
|
if err := r.collectLights(); err != nil {
|
|
return err
|
|
}
|
|
}
|
|
if r.mode == U3DRenderHiddenWireframe {
|
|
r.depthOnly = true
|
|
if err := r.drawScene(pass, passIndex); err != nil {
|
|
return err
|
|
}
|
|
r.depthOnly = false
|
|
}
|
|
if err := r.drawScene(pass, passIndex); err != nil {
|
|
return err
|
|
}
|
|
if last {
|
|
if err := r.drawSectionPlanes(); err != nil {
|
|
return err
|
|
}
|
|
}
|
|
return r.resolveFragments()
|
|
}
|
|
|
|
// drawScene 绘制当前轮次中的可见模型，不重置深度及片元缓存
|
|
// 入参: pass 绘制轮次, passIndex 轮次索引
|
|
// 返回: error 场景、资源或取消错误
|
|
func (r *u3dRender) drawScene(pass U3DViewPass, passIndex int) error {
|
|
for i, instance := range r.scene {
|
|
if err := r.ctx.Err(); err != nil {
|
|
return err
|
|
}
|
|
node := &r.model.Nodes[instance.node]
|
|
if !r.members[i] || node.Kind != "Model" || instance.modelVisibility(node) == 0 || instance.opacity == 0 {
|
|
continue
|
|
}
|
|
if node.Visibility > 3 {
|
|
return fmt.Errorf("invalid U3D model visibility")
|
|
}
|
|
mesh := r.nodeMesh(node)
|
|
if mesh == nil {
|
|
continue
|
|
}
|
|
if err := r.drawMesh(instance, node, mesh, pass, passIndex); err != nil {
|
|
return err
|
|
}
|
|
}
|
|
return nil
|
|
}
|