/*!****************************************************************************
@Function RenderLoadingScene
@Input iFrame
@Description Renders an animated loading screen.
******************************************************************************/
void OGLES2MultiThreading::RenderLoadingScene(int iFrame)
{
bool bRotate = PVRShellGet(prefIsRotated) && PVRShellGet(prefFullScreen);
float fHW = PVRShellGet(prefWidth) / 2.0f;
float fHH = PVRShellGet(prefHeight) / 2.0f;
PVRTMat4 mxProjection = PVRTMat4::Ortho(-fHW, fHH, fHW, -fHH, -1.0f, 1.0f, PVRTMat4::OGL, bRotate);
/*
Clears the color buffer.
*/
glClear(GL_COLOR_BUFFER_BIT);
// Actually use the created program
glUseProgram(handles.uiLoadProgram);
// First gets the location of that variable in the shader using its name
int i32MVPLocation = glGetUniformLocation(handles.uiLoadProgram, "myPMVMatrix");
int i32ColLocation = glGetUniformLocation(handles.uiLoadProgram, "myCol");
for(int iCircleIdx = 0; iCircleIdx < c_iNumCircles; ++iCircleIdx)
{
int iProg = iFrame+iCircleIdx*4;
float fScale = (0.75f + cos(iProg * 0.1f) * 0.25f);
float fY = sin(iProg * 0.1f) * 25.0f;
// Then passes the matrix to that variable
PVRTMat4 mxMVP = mxProjection * PVRTMat4::Translation(-175.0f + iCircleIdx * 50.0f, fY, 0.0f) * PVRTMat4::Scale(fScale,fScale,1.0f);
glUniformMatrix4fv(i32MVPLocation, 1, GL_FALSE, mxMVP.ptr());
// Pass the colour
glUniform3f(i32ColLocation, c_vCircleCols[iCircleIdx].x, c_vCircleCols[iCircleIdx].y, c_vCircleCols[iCircleIdx].z);
// Draw the loading circle
glBindBuffer(GL_ARRAY_BUFFER, handles.uiLoadVbo);
glEnableVertexAttribArray(VERTEX_ARRAY);
glVertexAttribPointer(VERTEX_ARRAY, 3, GL_FLOAT, GL_FALSE, 0, 0);
// Submit
glDrawArrays(GL_TRIANGLE_FAN, 0, c_iNumCirclePoints+2);
glDisableVertexAttribArray(VERTEX_ARRAY);
glBindBuffer(GL_ARRAY_BUFFER, 0);
}
float fW;
loadingText.SetProjection(mxProjection);
ELoadingProgress eProgress = eProgress_Init;
EnterCriticalSection(&handles.mutex);
eProgress = g_eProgress;
LeaveCriticalSection(&handles.mutex);
loadingText.MeasureText(&fW, NULL, 1.0f, c_pszLoadingProgress[eProgress]);
loadingText.Print3D(-fW*0.5f, -50.0f, 1.0f, 0xFFFFFFFF, c_pszLoadingProgress[eProgress]);
loadingText.Flush();
}
/*!***************************************************************************
@Function RenderTitle
@Input fFadeAmount
@Description Draws the title text.
*****************************************************************************/
void OGLES2IntroducingPrint3D::RenderTitle(float fFadeAmount)
{
unsigned int uiCol = (((unsigned int)(fFadeAmount * 255)) << 24) | 0x00FFFF;
float fW = PVRShellGet(prefWidth) * 0.5f;
float fH = PVRShellGet(prefHeight) * 0.5f;
bool bRotate = PVRShellGet(prefIsRotated) && PVRShellGet(prefFullScreen);
/*
Print3D can optionally be provided with user-defined projection and modelview matrices
which allow custom layout of text. Here we are just providing a projection matrix
so that text can be placed in viewport coordinates, rather than the default, more
abstract coordinate system of 0.0-100.0.
*/
PVRTMat4 mProjection = PVRTMat4::Ortho(-fW, fH, fW, -fH, -1.0f, 1.0f, PVRTMat4::OGL, bRotate);
m_IntroText.SetProjection(mProjection);
/*
Using the MeasureText() method provided by Print3D, we can determine the bounding-box
size of a string of text. This can be useful for justify text centrally, as we are
doing here.
*/
float fLine1W = 0.0f;
float fLine2W = 0.0f;
m_IntroText.MeasureText(&fLine1W, NULL, 1.0f, "introducing");
m_IntroText.MeasureText(&fLine2W, NULL, 1.0f, "print3d");
/*
Display some text.
Print3D() function allows to draw text anywhere on the screen using any colour.
Param 1: Position of the text along X
Param 2: Position of the text along Y
Param 3: Scale of the text
Param 4: Colour of the text (0xAABBGGRR format)
Param 5: Formatted string (uses the same syntax as printf)
...
*/
m_IntroText.Print3D(-fLine1W*0.5f, 50.0f, 1.0f, uiCol, "introducing");
m_IntroText.Print3D(-fLine2W*0.5f, 0.0f, 1.0f, uiCol, "print3d");
// Tells Print3D to do all the pending text rendering now
m_IntroText.Flush();
}
/*!***************************************************************************
@Function RenderText
@Description Draws the 3D text and scrolls in to the screen.
*****************************************************************************/
void OGLES2IntroducingPrint3D::RenderText()
{
float fAspect = (float)PVRShellGet(prefWidth) / (float)PVRShellGet(prefHeight);
bool bRotate = PVRShellGet(prefIsRotated) && PVRShellGet(prefFullScreen);
// Calculate the frame delta.
unsigned long ulNow = PVRShellGetTime();
if(m_ulPrevFrameT == 0) m_ulPrevFrameT = ulNow;
float fDT = (ulNow - m_ulPrevFrameT) * 0.001f;
m_ulPrevFrameT = ulNow;
// Calculate the FPS scale.
float fFPSScale = fDT / c_fTargetFPS;
// Move the text. Progressively speed up.
float fSpeedInc = 0.0f;
if(m_fTextOffset > 0.0f)
fSpeedInc = m_fTextOffset / TEXT_END_Y;
m_fTextOffset += (0.75f + (1.0f * fSpeedInc)) * fFPSScale;
if(m_fTextOffset > TEXT_END_Y)
m_fTextOffset = TEXT_START_Y;
PVRTMat4 mProjection = PVRTMat4::PerspectiveFovRH(0.7f, fAspect, 1.0f, 2000.0f, PVRTMat4::OGL, bRotate);
PVRTMat4 mScale = PVRTMat4::Scale(PVRTVec3(1.0f, -1.0f, 1.0f));
PVRTMat4 mCamera = PVRTMat4::LookAtRH(PVRTVec3(0.0f, -900.0f, 700.0f), PVRTVec3(0.0f,-200.0f,0.0f), PVRTVec3(0.0f,1.0f,0.0f));
PVRTMat4 mTrans = PVRTMat4::Translation(PVRTVec3(0.0f, m_fTextOffset, 0.0f));
PVRTMat4 mModelView = mCamera * mTrans;
float fStrWidth = 0.0f;
/*
Print3D can optionally be provided with user-defined projection and model-view matrices
which allow custom layout of text. Here we are proving both a projection and model-view
matrix. The projection matrix specified here uses perspective projection which will
provide the 3D effect. The model-view matrix positions the the text in world space
providing the 'camera' position and the scrolling of the text.
*/
m_CentralText.SetProjection(mProjection);
m_CentralText.SetModelView(mModelView);
/*
The previous method (RenderTitle()) explains the following functions in more detail
however put simply, we are looping the entire array of loaded text which is encoded
in UTF-8. Print3D batches this internally and the call to Flush() will render the
text to the frame buffer. We are also fading out the text over a certain distance.
*/
float fPos, fFade;
unsigned int uiCol;
for(unsigned int uiIndex = 0; uiIndex < m_TextLines.GetSize(); ++uiIndex)
{
fPos = (m_fTextOffset - (uiIndex * 36.0f));
fFade = 1.0f;
if(fPos > TEXT_FADE_START)
{
fFade = PVRTClamp(1.0f - ((fPos - TEXT_FADE_START) / (TEXT_FADE_END - TEXT_FADE_START)), 0.0f, 1.0f);
}
uiCol = (((unsigned int)(fFade * 255)) << 24) | 0x00FFFF;
m_CentralText.MeasureText(&fStrWidth, NULL, 1.0f, (const char*)m_TextLines[uiIndex]);
m_CentralText.Print3D(-(fStrWidth*0.5f), -(uiIndex * 36.0f), 1.0f, uiCol, (const char*)m_TextLines[uiIndex]);
}
m_CentralText.Flush();
}