Ogre introduction

1.Ogre Library compilation

1.1 Download and install DIrectX SDK

Download and install from the link below DirectX SDK：
Download address ：DirectX SDK

1.2 from git Pull the latest code

>> git clone --recursive [email protected]:OGRECave/ogre.git
>> git checkout v13.4.1

1.3 Use CMake compile Ogre

It is recommended to use cmake-gui, According to my experience , You can compile it once , Finally, a sdk Folder , It contains all the compiled files .

2.Ogre To configure

2.1 take sdk Under subdirectories bin Directory added to path route

2.2 Create a new one vs engineering , To configure sdk The next path include and lib

include The path is added as follows ：

lib The path is added as follows ：

Add additional dependencies ：

3. Add test code

#include <iostream>

#include "Ogre.h"
#include "OgreApplicationContext.h"
#include "OgreInput.h"
#include "OgreRTShaderSystem.h"

using namespace Ogre;
using namespace OgreBites;

class Basic : 
	public ApplicationContext,
	public InputListener {
public:
	Basic();
	virtual ~Basic() {}

	void setup();
	bool keyPressed(const KeyboardEvent& evt);
};

Basic::Basic() : ApplicationContext("Ogre") {}

void Basic::setup() {
	// 1. Call the parent class 
	ApplicationContext::setup();
	addInputListener(this);

	// 2. Get a pointer to the created root
	Root* root = getRoot();
	SceneManager* scnMgr = root->createSceneManager();

	// 3. Register our scene
	RTShader::ShaderGenerator* shadergen = RTShader::ShaderGenerator::getSingletonPtr();
	shadergen->addSceneManager(scnMgr);

	// 4. Adjust the light 
	scnMgr->setAmbientLight(ColourValue(0.5, 0.5, 0.5));

	// 5. New light 
	Light* light = scnMgr->createLight("MainLight");
	SceneNode* lightNode = scnMgr->getRootSceneNode()->createChildSceneNode();
	lightNode->attachObject(light);

	// 6. Light location 
	lightNode->setPosition(20, 80, 50);

	// 7. The camera 
	SceneNode* camNode = scnMgr->getRootSceneNode()->createChildSceneNode();
	Camera* cam = scnMgr->createCamera("myCam");
	cam->setNearClipDistance(5);
	cam->setAutoAspectRatio(true);
	camNode->attachObject(cam);
	camNode->setPosition(0, 0, 140);

	// 8. Tell him to render to the main window 
	getRenderWindow()->addViewport(cam);

	// 9.Entity
	Entity* ogreEntity = scnMgr->createEntity("ogrehead.mesh");
	SceneNode* ogreNode = scnMgr->getRootSceneNode()->createChildSceneNode();
	ogreNode->attachObject(ogreEntity);
	// 10. Mobile camera 
	camNode->setPosition(0, 47, 222);

	// 11.Entity2
	Entity* ogreEntity2 = scnMgr->createEntity("ogrehead.mesh");
	SceneNode* ogreNode2 = scnMgr->getRootSceneNode()->createChildSceneNode(Vector3(84, 48, 0));
	ogreNode2->attachObject(ogreEntity2);

	// 12.Entity3
	Entity* ogreEntity3 = scnMgr->createEntity("ogrehead.mesh");
	SceneNode* ogreNode3 = scnMgr->getRootSceneNode()->createChildSceneNode();
	ogreNode3->setPosition(0, 104, 0);
	ogreNode3->setScale(2, 1.2, 1);
	ogreNode3->attachObject(ogreEntity3);

	// 13.Entity4
	Entity* ogreEntity4 = scnMgr->createEntity("ogrehead.mesh");
	SceneNode* ogreNode4 = scnMgr->getRootSceneNode()->createChildSceneNode();
	ogreNode4->setPosition(-84, 48, 0);
	ogreNode4->roll(Degree(-90));
	ogreNode4->attachObject(ogreEntity4);
}

bool Basic::keyPressed(const KeyboardEvent& evt) {
	if (evt.keysym.sym == SDLK_ESCAPE) {
		getRoot()->queueEndRendering();
	}
	return true;
}

int main(int argc, char** argv) {
	try {
		Basic app;
		app.initApp();
		app.getRoot()->startRendering();
		app.closeApp();
	}
	catch (const std::exception& e) {
		std::cerr << "Error occurred during execution: " << e.what() << '\n';
		return 1;
	}

	return 0;
}

4. Deal with resource loading

4.1 take sdk Of bin All under the folder .dll Document and .cfg Copy the file to the project generated .exe Under the folder

>> E:\vs_project\OgreTest\x64\Release

4.2 modify resources.cfg file , Set the resource loading path

# Ogre Core Resources
[OgreInternal]
FileSystem=../../Media/Main
FileSystem=../../Media/RTShaderLib/GLSL
FileSystem=../../Media/Terrain/

# Resources required by the sample browser and most samples.
[Essential]
Zip=../../Media/packs/SdkTrays.zip
Zip=../../Media/packs/profiler.zip
FileSystem=../../Media/thumbnails

# Common sample resources needed by many of the samples.
# Rarely used resources should be separately loaded by the
# samples which require them.
[General]
# PBR media must come before the scripts that reference it
FileSystem=../../Media/PBR
FileSystem=../../Media/PBR/filament
FileSystem=../../Media/materials/textures/PBR

FileSystem=../../Media/materials/programs/GLSL
FileSystem=../../Media/materials/programs/GLSL120
FileSystem=../../Media/materials/programs/GLSL150
FileSystem=../../Media/materials/programs/GLSL400
FileSystem=../../Media/materials/programs/GLSLES
FileSystem=../../Media/materials/programs/SPIRV
FileSystem=../../Media/materials/programs/Cg
FileSystem=../../Media/materials/programs/HLSL
FileSystem=../../Media/materials/programs/HLSL_Cg
FileSystem=../../Media/materials/scripts
FileSystem=../../Media/materials/textures
FileSystem=../../Media/materials/textures/terrain
FileSystem=../../Media/models
FileSystem=../../Media/particle
FileSystem=../../Media/DeferredShadingMedia
FileSystem=../../Media/DeferredShadingMedia/DeferredShading/post
FileSystem=../../Media/PCZAppMedia
FileSystem=../../Media/materials/scripts/SSAO
FileSystem=../../Media/materials/textures/SSAO
FileSystem=../../Media/volumeTerrain
FileSystem=../../Media/CSMShadows
Zip=../../Media/packs/cubemap.zip
Zip=../../Media/packs/cubemapsJS.zip
Zip=../../Media/packs/dragon.zip
Zip=../../Media/packs/fresneldemo.zip
Zip=../../Media/packs/ogredance.zip
Zip=../../Media/packs/Sinbad.zip
Zip=../../Media/packs/skybox.zip
Zip=../../Media/volumeTerrain/volumeTerrainBig.zip

Zip=../../Media/packs/DamagedHelmet.zip
Zip=../../Media/packs/filament_shaders.zip

[BSPWorld]
Zip=../../Media/packs/oa_rpg3dm2.pk3
Zip=../../Media/packs/ogretestmap.zip

# Materials for visual tests
[Tests]
FileSystem=../Tests/Media

4.3 take sdk Next resource file Media Folder copy to the set path

4.4 Run the test example again

Reference material

• [1] Ogre course