Oculus Rift SDL2 OpenGL Demo

Thanks for sharing, always helpful to have another source of reference.

Nice work. Thanks for posting.

Great! Thanks for 1st working OpenGL-example (for me :) )

Now, I have two problems with this example:

1) somehow the perspective seems to be with vUp towards right side. How can ego position and lookat be changed (e.g. similar to gluLookAt)

2) when trying to debug (with VStudio 2010), whole Visual Studio / Windows freezes after call of ovrHmd_ConfigureRendering()

2) can be solved with this: viewtopic.php?f=17&t=8611&p=125523#p125523

However the system is still badly inrepsonsive while debugging (only keyboard works)

now solved 1), too. model coordinate system (RHS) was Y,Z,-X compared to Oculus one :D

virtualroad.jpg

Thanks for putting this together, I was able to compile on Linux with the little changes, 'min()' is not defined, I added

inline int max ( int a, int b ) { return a > b ? a : b; }

And then I had a huge command line

$ g++ `sdl2-config --cflags` -I /storage/OculusSDK-official-0.3.2/LibOVR/Src/ SDL_oculus_0_3_4.c -L /storage/OculusSDK-official-0.3.2/LibOVR/Lib/Linux/Release/x86_64/ -lovr -ludev -lGL -lGLEW -lX11 -lXrandr -lpthread `sdl2-config --libs` -o SDL_oculus

Unfortunately the new version (which you link above) does not work.... I guess I'll have to wait for Oculus to get their act together with Linux version of SDK 0.4 :x

Cheers,
Simon

First time playing with any Oculus SDK but I got it working! Thanks! Had a bit of trouble setting it up at first but here are my VS2010 express project settings:

Library Directories:

...Includes\OculusSDK\LibOVR\Lib\Win32\VS2010
...Includes\OpenGL\glew-1.9.0\lib
...Includes\SDL2-2.0.3\lib\x86

Include Directories:

...Includes\SDL2-2.0.3\include
...Includes\OculusSDK\LibOVR\Src
...Includes\OpenGL\glew-1.9.0\include

/MD set

Libraries:

glew32s.lib
opengl32.lib
libovr.lib
ws2_32.lib
winmm.lib
SDL2.lib
SDL2main.lib

Ignore Specific Library:

atls.lib

Add to release folder:

SDL2.dll

DK2 set to extended desktop mode (crashes with console output OVRcreateDXGIFactory2 result 0x0 otherwise).

Hello! Thanks for the example!
I've been trying to cram the oculusRoomTiny example and this one together, and everything is working save the positional tracking, but I'm not sure why. The important bits are:

		static float    BodyYaw(3.141592f);
		static Vector3f HeadPos(0.0f, 1.6f, -5.0f);
		HeadPos.y = ovrHmd_GetFloat(hmd, OVR_KEY_EYE_HEIGHT, HeadPos.y);
		
		for (int eyeIndex = 0; eyeIndex < ovrEye_Count; eyeIndex++)
		{
			ovrEyeType eye = hmd->EyeRenderOrder[eyeIndex];
			eyeRenderPose[eye] = ovrHmd_GetEyePose(hmd, eye);
			
			// Get view and projection matrices
			Matrix4f rollPitchYaw = Matrix4f::RotationY(BodyYaw);
			Matrix4f finalRollPitchYaw = rollPitchYaw * Matrix4f(eyeRenderPose[eye].Orientation);
			Vector3f finalUp = finalRollPitchYaw.Transform(Vector3f(0, 1, 0));
			Vector3f finalForward = finalRollPitchYaw.Transform(Vector3f(0, 0, -1));
			Vector3f shiftedEyePos = HeadPos + rollPitchYaw.Transform(eyeRenderPose[eye].Position);
			Matrix4f view = Matrix4f::LookAtRH(shiftedEyePos, shiftedEyePos + finalForward, finalUp);
			Matrix4f proj = ovrMatrix4f_Projection(eyeRenderDesc[eye].Fov, 0.01f, 10000.0f, true);
			Matrix4f MVPMatrix = proj * Matrix4f::Translation(eyeRenderDesc[eye].ViewAdjust) * view;

			glViewport(eyeRenderViewport[eye].Pos.x, eyeRenderViewport[eye].Pos.y, eyeRenderViewport[eye].Size.w, eyeRenderViewport[eye].Size.h);

			
			glUniformMatrix4fv(MVPMatrixLocation, 1, GL_FALSE, &MVPMatrix.Transposed().M[0][0]);

			
			glDrawArrays(GL_TRIANGLES, 0, 3);
			

		}

		glBindVertexArray(0);

		ovrHmd_EndFrame(hmd, eyeRenderPose, &eyeTexture[0].Texture);

The rest is essentially the above example.

By using eyeRenderPose[eye].Position to gain shiftedEyePos, and by working that into my view matrix, I THOUGHT positional tracking would work, but no luck :(

Any tips on what I'm doing wrong? Sorry if this is the wrong place to ask.

Thanks!

Just wanted to say thanks for this great starting point, allowed me to dive in headfirst!