98 lines
2.4 KiB
Go
98 lines
2.4 KiB
Go
//go:build go1.21
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// +build go1.21
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package rl
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/*
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#include "raylib.h"
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#include <stdlib.h>
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*/
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import "C"
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import (
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"runtime"
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"slices"
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)
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// List of VaoIDs of meshes created by calling UploadMesh()
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// Used by UnloadMesh() to determine if mesh is go-managed or C-allocated
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var goManagedMeshIDs = make([]uint32, 0)
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// UploadMesh - Upload vertex data into a VAO (if supported) and VBO
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func UploadMesh(mesh *Mesh, dynamic bool) {
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// check if mesh has already been uploaded to prevent duplication
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if mesh.VaoID != 0 {
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TraceLog(LogWarning, "VAO: [ID %d] Trying to re-load an already loaded mesh", mesh.VaoID)
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return
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}
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pinner := runtime.Pinner{}
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// Mesh pointer fields must be pinned to allow a Mesh pointer to be passed to C.UploadMesh() below
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// nil checks are required because Pin() will panic if passed nil
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if mesh.Vertices != nil {
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pinner.Pin(mesh.Vertices)
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}
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if mesh.Texcoords != nil {
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pinner.Pin(mesh.Texcoords)
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}
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if mesh.Texcoords2 != nil {
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pinner.Pin(mesh.Texcoords2)
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}
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if mesh.Normals != nil {
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pinner.Pin(mesh.Normals)
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}
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if mesh.Tangents != nil {
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pinner.Pin(mesh.Tangents)
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}
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if mesh.Colors != nil {
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pinner.Pin(mesh.Colors)
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}
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if mesh.Indices != nil {
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pinner.Pin(mesh.Indices)
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}
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if mesh.AnimVertices != nil {
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pinner.Pin(mesh.AnimVertices)
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}
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if mesh.AnimNormals != nil {
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pinner.Pin(mesh.AnimNormals)
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}
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if mesh.BoneIds != nil {
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pinner.Pin(mesh.BoneIds)
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}
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if mesh.BoneWeights != nil {
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pinner.Pin(mesh.BoneWeights)
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}
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// VboID of a new mesh should always be nil before uploading, but including this in case a mesh happens to have it set.
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if mesh.VboID != nil {
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pinner.Pin(mesh.VboID)
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}
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cMesh := mesh.cptr()
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C.UploadMesh(cMesh, C.bool(dynamic))
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// Add new mesh VaoID to list
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goManagedMeshIDs = append(goManagedMeshIDs, mesh.VaoID)
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pinner.Unpin()
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}
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// UnloadMesh - Unload mesh from memory (RAM and/or VRAM)
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func UnloadMesh(mesh *Mesh) {
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// Check list of go-managed mesh IDs
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if slices.Contains(goManagedMeshIDs, mesh.VaoID) {
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// C.UnloadMesh() only needs to read the VaoID & VboID
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// passing a temporary struct with all other fields nil makes it safe for the C code to call free()
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tempMesh := Mesh{
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VaoID: mesh.VaoID,
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VboID: mesh.VboID,
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}
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cmesh := tempMesh.cptr()
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C.UnloadMesh(*cmesh)
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// remove mesh VaoID from list
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goManagedMeshIDs = slices.DeleteFunc(goManagedMeshIDs, func(id uint32) bool { return id == mesh.VaoID })
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} else {
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cmesh := mesh.cptr()
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C.UnloadMesh(*cmesh)
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}
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}
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