mirror of
https://github.com/DrBeef/Doom3Quest.git
synced 2024-12-11 20:50:52 +00:00
148 lines
4.6 KiB
C
148 lines
4.6 KiB
C
/************************************************************************************
|
|
|
|
Filename : VrCompositor.c
|
|
|
|
*************************************************************************************/
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <math.h>
|
|
#include <time.h>
|
|
#include <unistd.h>
|
|
#include <pthread.h>
|
|
#include <sys/prctl.h> // for prctl( PR_SET_NAME )
|
|
#include <android/log.h>
|
|
#include <android/window.h> // for AWINDOW_FLAG_KEEP_SCREEN_ON
|
|
|
|
#include <EGL/egl.h>
|
|
#include <EGL/eglext.h>
|
|
#include <GLES3/gl3.h>
|
|
#include <GLES3/gl3ext.h>
|
|
|
|
|
|
|
|
#include <VrApi.h>
|
|
#include <VrApi_Helpers.h>
|
|
|
|
#include "VrCompositor.h"
|
|
|
|
/*
|
|
================================================================================
|
|
|
|
ovrScene
|
|
|
|
================================================================================
|
|
*/
|
|
|
|
void ovrScene_Clear( ovrScene * scene )
|
|
{
|
|
scene->CreatedScene = false;
|
|
ovrRenderer_Clear( &scene->CylinderRenderer );
|
|
|
|
scene->CylinderWidth = 0;
|
|
scene->CylinderHeight = 0;
|
|
}
|
|
|
|
void ovrScene_Create( int width, int height, ovrScene * scene, const ovrJava * java )
|
|
{
|
|
// Create Cylinder renderer
|
|
if (!scene->CreatedScene)
|
|
{
|
|
scene->CylinderWidth = width;
|
|
scene->CylinderHeight = height;
|
|
|
|
//Create cylinder renderer
|
|
ovrRenderer_Create( width, height, &scene->CylinderRenderer, java );
|
|
}
|
|
|
|
scene->CreatedScene = true;
|
|
}
|
|
|
|
void ovrScene_Destroy( ovrScene * scene )
|
|
{
|
|
ovrRenderer_Destroy( &scene->CylinderRenderer );
|
|
|
|
scene->CreatedScene = false;
|
|
}
|
|
|
|
|
|
// Assumes landscape cylinder shape.
|
|
static ovrMatrix4f CylinderModelMatrix( const int texWidth, const int texHeight,
|
|
const ovrVector3f translation,
|
|
const float rotateYaw,
|
|
const float rotatePitch,
|
|
const float radius,
|
|
const float density )
|
|
{
|
|
const ovrMatrix4f scaleMatrix = ovrMatrix4f_CreateScale( radius, radius * (float)texHeight * VRAPI_PI / density, radius );
|
|
const ovrMatrix4f transMatrix = ovrMatrix4f_CreateTranslation( translation.x, translation.y, translation.z );
|
|
const ovrMatrix4f rotXMatrix = ovrMatrix4f_CreateRotation( rotateYaw, 0.0f, 0.0f );
|
|
const ovrMatrix4f rotYMatrix = ovrMatrix4f_CreateRotation( 0.0f, rotatePitch, 0.0f );
|
|
|
|
const ovrMatrix4f m0 = ovrMatrix4f_Multiply( &transMatrix, &scaleMatrix );
|
|
const ovrMatrix4f m1 = ovrMatrix4f_Multiply( &rotXMatrix, &m0 );
|
|
const ovrMatrix4f m2 = ovrMatrix4f_Multiply( &rotYMatrix, &m1 );
|
|
|
|
return m2;
|
|
}
|
|
|
|
ovrLayerCylinder2 BuildCylinderLayer( ovrRenderer * cylinderRenderer,
|
|
const int textureWidth, const int textureHeight,
|
|
const ovrTracking2 * tracking, float rotatePitch )
|
|
{
|
|
ovrLayerCylinder2 layer = vrapi_DefaultLayerCylinder2();
|
|
|
|
const float fadeLevel = 1.0f;
|
|
layer.Header.ColorScale.x =
|
|
layer.Header.ColorScale.y =
|
|
layer.Header.ColorScale.z =
|
|
layer.Header.ColorScale.w = fadeLevel;
|
|
|
|
//Alpha issues!! ??
|
|
//layer.Header.SrcBlend = VRAPI_FRAME_LAYER_BLEND_SRC_ALPHA;
|
|
//layer.Header.DstBlend = VRAPI_FRAME_LAYER_BLEND_ONE_MINUS_SRC_ALPHA;
|
|
|
|
//layer.Header.Flags = VRAPI_FRAME_LAYER_FLAG_CLIP_TO_TEXTURE_RECT;
|
|
|
|
layer.HeadPose = tracking->HeadPose;
|
|
|
|
const float density = 4500.0f;
|
|
const float rotateYaw = 0.0f;
|
|
const float radius = 6.0f;
|
|
const ovrVector3f translation = { 0.0f, 0.0f, -5.0f };
|
|
|
|
ovrMatrix4f cylinderTransform =
|
|
CylinderModelMatrix( textureWidth, textureHeight, translation,
|
|
rotateYaw, rotatePitch, radius, density );
|
|
|
|
const float circScale = density * 0.5f / textureWidth;
|
|
const float circBias = -circScale * ( 0.5f * ( 1.0f - 1.0f / circScale ) );
|
|
|
|
for ( int eye = 0; eye < VRAPI_FRAME_LAYER_EYE_MAX; eye++ )
|
|
{
|
|
ovrFramebuffer * cylinderFrameBuffer = &cylinderRenderer->FrameBuffer[eye];
|
|
|
|
ovrMatrix4f modelViewMatrix = ovrMatrix4f_Multiply( &tracking->Eye[eye].ViewMatrix, &cylinderTransform );
|
|
layer.Textures[eye].TexCoordsFromTanAngles = ovrMatrix4f_Inverse( &modelViewMatrix );
|
|
layer.Textures[eye].ColorSwapChain = cylinderFrameBuffer->ColorTextureSwapChain;
|
|
layer.Textures[eye].SwapChainIndex = cylinderFrameBuffer->ReadyTextureSwapChainIndex;
|
|
|
|
// Texcoord scale and bias is just a representation of the aspect ratio. The positioning
|
|
// of the cylinder is handled entirely by the TexCoordsFromTanAngles matrix.
|
|
|
|
const float texScaleX = circScale;
|
|
const float texBiasX = circBias;
|
|
const float texScaleY = -0.5f;
|
|
const float texBiasY = texScaleY * ( 0.5f * ( 1.0f - ( 1.0f / texScaleY ) ) );
|
|
|
|
layer.Textures[eye].TextureMatrix.M[0][0] = texScaleX;
|
|
layer.Textures[eye].TextureMatrix.M[0][2] = texBiasX;
|
|
layer.Textures[eye].TextureMatrix.M[1][1] = texScaleY;
|
|
layer.Textures[eye].TextureMatrix.M[1][2] = -texBiasY;
|
|
|
|
layer.Textures[eye].TextureRect.width = 1.0f;
|
|
layer.Textures[eye].TextureRect.height = 1.0f;
|
|
}
|
|
|
|
return layer;
|
|
}
|