Build script + rename tag release->nmage_release+protect against invalid physx use

build.sh

@@ -0,0 +1,28 @@
+#!/bin/bash
+
+set -e
+
+if [[ $# -ne 1 ]]; then
+    echo -e "1) Build Debug mode\n2) Build Release mode"
+    exit 0
+fi
+
+mode=$1
+if [[ $mode -eq 1 ]]; then
+
+    ./switch-physx-mode.sh 1
+    go build .
+    echo "Debug build finished"
+
+elif [[ $mode -eq 2 ]]; then
+
+    ./switch-physx-mode.sh 2
+    go build -tags "nmage_release,physx_release" .
+    echo "Release build finished"
+
+else
+
+    echo "Unknown build option. Please select 1 for a Debug build or 2 for a Release build"
+    exit 1
+
+fi

consts/flags_debug.go

@@ -1,4 +1,4 @@
-//go:build !release
+//go:build !nmage_release
 
 package consts
 

consts/flags_release.go

@@ -1,4 +1,4 @@
-//go:build release
+//go:build nmage_release
 
 package consts
 

engine/engine.go

@@ -172,6 +172,7 @@ func createWindow(title string, x, y, width, height int32, flags WindowFlags, re
 		return nil, err
 	}
 
+	win.SDLWin.GLSwap()
 	return win, err
 }
 

go.mod

@@ -9,5 +9,8 @@ require github.com/go-gl/gl v0.0.0-20211210172815-726fda9656d6
 require (
 	github.com/bloeys/assimp-go v0.4.4
 	github.com/bloeys/gglm v0.43.0
+	github.com/bloeys/physx-go v0.2.0
 	github.com/inkyblackness/imgui-go/v4 v4.6.0
 )
+
+// replace github.com/bloeys/physx-go => ../physx-go

go.sum

@@ -2,6 +2,8 @@ github.com/bloeys/assimp-go v0.4.4 h1:Yn5e/RpE0Oes0YMBy8O7KkwAO4R/RpgrZPJCt08dVI
 github.com/bloeys/assimp-go v0.4.4/go.mod h1:my3yRxT7CfOztmvi+0svmwbaqw0KFrxaHxncoyaEIP0=
 github.com/bloeys/gglm v0.43.0 h1:ZpOghR3PHfpkigTDh+FqxLsF0gN8CD6s/bWoei6LyxI=
 github.com/bloeys/gglm v0.43.0/go.mod h1:qwJQ0WzV191wAMwlGicbfbChbKoSedMk7gFFX6GnyOk=
+github.com/bloeys/physx-go v0.2.0 h1:zsjskoPFlH7m8hKnlCsJ4hVKe8ys2s1fLEhcNDfofS4=
+github.com/bloeys/physx-go v0.2.0/go.mod h1:YNt5tX4T8d/4RdldvpWc77DeHM4jqlIunUQUi/rqSKA=
 github.com/davecgh/go-spew v1.1.0 h1:ZDRjVQ15GmhC3fiQ8ni8+OwkZQO4DARzQgrnXU1Liz8=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/go-gl/gl v0.0.0-20211210172815-726fda9656d6 h1:zDw5v7qm4yH7N8C8uWd+8Ii9rROdgWxQuGoJ9WDXxfk=

main.go

@@ -13,9 +13,11 @@ import (
 	"github.com/bloeys/nmage/logging"
 	"github.com/bloeys/nmage/materials"
 	"github.com/bloeys/nmage/meshes"
+	"github.com/bloeys/nmage/physics/physx"
 	"github.com/bloeys/nmage/renderer/rend3dgl"
 	"github.com/bloeys/nmage/timing"
 	nmageimgui "github.com/bloeys/nmage/ui/imgui"
+	"github.com/bloeys/physx-go/pgo"
 	"github.com/go-gl/gl/v4.1-core/gl"
 	"github.com/inkyblackness/imgui-go/v4"
 	"github.com/veandco/go-sdl2/sdl"
@@ -65,6 +67,7 @@ var (
 type OurGame struct {
 	Win       *engine.Window
 	ImGUIInfo nmageimgui.ImguiInfo
+	Px        *physx.PhysX
 }
 
 type TransformComp struct {
@@ -215,6 +218,33 @@ func (g *OurGame) Init() {
 	//Lights
 	simpleMat.SetUnifVec3("lightPos1", lightPos1)
 	simpleMat.SetUnifVec3("lightColor1", lightColor1)
+
+	// Setup physx
+	px, err := physx.NewPhysx(physx.PhysXCreationOptions{
+		TypicalObjectLength: 1,
+		TypicalObjectSpeed:  9.81,
+
+		EnableVisualDebugger:               pgo.PvdSupported,
+		VisualDebuggerHost:                 "127.0.0.1",
+		VisualDebuggerPort:                 5425,
+		VisualDebuggerTimeoutMillis:        10_000,
+		VisualDebuggerTransmitConstraints:  true,
+		VisualDebuggerTransmitContacts:     true,
+		VisualDebuggerTransmitSceneQueries: true,
+
+		SceneGravity: gglm.NewVec3(0, -9.81, 0),
+
+		SceneCPUDispatcherThreads: 2,
+		SceneContactHandler:       g.PhysxContactHandler,
+	})
+	if err != nil {
+		logging.ErrLog.Fatalln("Failed to create PhysX. Err:", err)
+	}
+	g.Px = px
+}
+
+func (g *OurGame) PhysxContactHandler(pgo.ContactPairHeader) {
+
 }
 
 func (g *OurGame) Update() {

physics/physx/physx.go

@@ -0,0 +1,86 @@
+package physx
+
+import (
+	"errors"
+
+	"github.com/bloeys/gglm/gglm"
+	"github.com/bloeys/nmage/logging"
+	"github.com/bloeys/physx-go/pgo"
+)
+
+type PhysX struct {
+	Foundation *pgo.Foundation
+	Physics    *pgo.Physics
+	Scene      *pgo.Scene
+}
+
+type PhysXCreationOptions struct {
+
+	// Good defaults are length=1 (1m sizes), and speed=9.81 (speed of gravity)
+	TypicalObjectLength float32
+	// Good defaults are length=1 (1m sizes), and speed=9.81 (speed of gravity)
+	TypicalObjectSpeed float32
+
+	// If EnableVisualDebugger=true then all VisualDebuggerXYZ variables must be set
+	EnableVisualDebugger bool
+	VisualDebuggerHost   string
+	// Default port is 5425
+	VisualDebuggerPort                 int
+	VisualDebuggerTimeoutMillis        int
+	VisualDebuggerTransmitConstraints  bool
+	VisualDebuggerTransmitContacts     bool
+	VisualDebuggerTransmitSceneQueries bool
+
+	SceneGravity *gglm.Vec3
+	// Number of internal PhysX threads that do work.
+	// If this is zero then all work is done on the thread that calls simulate
+	SceneCPUDispatcherThreads uint32
+	// Gets called when two objects collide
+	SceneContactHandler func(cph pgo.ContactPairHeader)
+}
+
+func NewPhysx(options PhysXCreationOptions) (px *PhysX, err error) {
+
+	if options.EnableVisualDebugger && !pgo.PvdSupported {
+		return nil, errors.New("can not enable PhysX visual debugger (PVD) because physx-go is in release mode. Please build without the 'physx_release' tag")
+	}
+
+	logging.InfoLog.Printf("Initializing PhysX. Worker threads: %d. PVD supported: %v\n", options.SceneCPUDispatcherThreads, pgo.PvdSupported)
+
+	// Setup foundation, pvd, and physics
+	px = &PhysX{}
+	px.Foundation = pgo.CreateFoundation()
+
+	ts := pgo.NewTolerancesScale(options.TypicalObjectLength, options.TypicalObjectSpeed)
+	if options.EnableVisualDebugger {
+
+		pvdTr := pgo.DefaultPvdSocketTransportCreate(options.VisualDebuggerHost, options.VisualDebuggerPort, options.VisualDebuggerTimeoutMillis)
+		pvd := pgo.CreatePvd(px.Foundation)
+		if !pvd.Connect(pvdTr, pgo.PvdInstrumentationFlag_eALL) {
+			return nil, errors.New("failed to connect to PhysX Visual Debugger. Is it running? Did you pass correct visual debugger host/port (default port is 5425)?")
+		}
+
+		px.Physics = pgo.CreatePhysics(px.Foundation, ts, false, pvd)
+
+	} else {
+		px.Physics = pgo.CreatePhysics(px.Foundation, ts, false, nil)
+	}
+
+	// Setup scene
+	sd := pgo.NewSceneDesc(ts)
+	sd.SetGravity(pgo.NewVec3(options.SceneGravity.X(), options.SceneGravity.Y(), options.SceneGravity.Z()))
+	sd.SetCpuDispatcher(pgo.DefaultCpuDispatcherCreate(options.SceneCPUDispatcherThreads, nil).ToCpuDispatcher())
+	sd.SetOnContactCallback(options.SceneContactHandler)
+
+	px.Scene = px.Physics.CreateScene(sd)
+	if options.EnableVisualDebugger {
+
+		scenePvdClient := px.Scene.GetScenePvdClient()
+		scenePvdClient.SetScenePvdFlag(pgo.PvdSceneFlag_eTRANSMIT_CONSTRAINTS, options.VisualDebuggerTransmitConstraints)
+		scenePvdClient.SetScenePvdFlag(pgo.PvdSceneFlag_eTRANSMIT_CONTACTS, options.VisualDebuggerTransmitContacts)
+		scenePvdClient.SetScenePvdFlag(pgo.PvdSceneFlag_eTRANSMIT_SCENEQUERIES, options.VisualDebuggerTransmitSceneQueries)
+		scenePvdClient.Release()
+	}
+
+	return px, nil
+}

switch-physx-mode.sh

@@ -0,0 +1,38 @@
+#!/bin/bash
+
+set -e
+
+if [[ $# -ne 1 ]]; then
+    echo -e "1) Checked mode\n2) Release mode"
+    exit 0
+fi
+
+mode=$1
+physxBinDir="../physx/physx/bin/win.x86_64.vc142.mt"
+physxCBinDir="../physx-c/x64"
+if [[ $mode -eq 1 ]]; then
+
+    physxCheckedBinDir="$physxBinDir/checked"
+    cp "$physxCheckedBinDir/PhysX_64.dll" "$physxCheckedBinDir/PhysXCommon_64.dll" "$physxCheckedBinDir/PhysXFoundation_64.dll" .
+
+    physxCCheckedBinDir="$physxCBinDir/Checked"
+    cp "$physxCCheckedBinDir/physx-c.dll" .
+
+    echo "Switched PhysX to Checked mode"
+
+elif [[ $mode -eq 2 ]]; then
+
+    physxReleaseBinDir="$physxBinDir/release"
+    cp "$physxReleaseBinDir/PhysX_64.dll" "$physxReleaseBinDir/PhysXCommon_64.dll" "$physxReleaseBinDir/PhysXFoundation_64.dll" .
+
+    physxCReleaseBinDir="$physxCBinDir/Release"
+    cp "$physxCReleaseBinDir/physx-c.dll" .
+
+    echo "Switched PhysX to Release mode"
+
+else
+
+    echo "Unknown mode. Please select 1 or 2"
+    exit 1
+
+fi