/*!****************************************************************************
@Function DrawSkybox
@Description Draws the skybox onto the screen.
******************************************************************************/
void OGLES2Glass::DrawSkybox()
{
glUseProgram(m_SkyboxProgram.uiId);
PVRTMat4 mVP = m_mProjection * m_mView;
PVRTMat4 mInvVP = mVP.inverseEx();
glUniformMatrix4fv(m_SkyboxProgram.auiLoc[eInvVPMatrix], 1, GL_FALSE, mInvVP.ptr());
PVRTVec3 vEyePos = m_mView.inverse() * PVRTVec4(0, 0, 0, 1);
glUniform3fv(m_SkyboxProgram.auiLoc[eEyePos], 1, vEyePos.ptr());
glBindBuffer(GL_ARRAY_BUFFER, m_uiSquareVbo);
glEnableVertexAttribArray(VERTEX_ARRAY);
glVertexAttribPointer(VERTEX_ARRAY, 3, GL_FLOAT, GL_FALSE, sizeof(GLfloat) * 3, 0);
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_CUBE_MAP, m_uiCubeTex);
glDrawArrays(GL_TRIANGLES, 0, 6);
glDisableVertexAttribArray(VERTEX_ARRAY);
glBindBuffer(GL_ARRAY_BUFFER, 0);
}
/*!****************************************************************************
@Function RenderScene
@Return bool true if no error occurred
@Description Main rendering loop function of the program. The shell will
call this function every frame.
eglSwapBuffers() will be performed by PVRShell automatically.
PVRShell will also manage important OS events.
Will also manage relevant OS events. The user has access to
these events through an abstraction layer provided by PVRShell.
******************************************************************************/
bool OGLES2ParallaxBumpMap::RenderScene()
{
// Clear the color and depth buffer
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
// Use shader program
glUseProgram(m_ShaderProgram.uiId);
// Bind textures
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D, m_uiBaseTex);
glActiveTexture(GL_TEXTURE1);
glBindTexture(GL_TEXTURE_2D, m_uiNormalMap);
glActiveTexture(GL_TEXTURE2);
glBindTexture(GL_TEXTURE_2D, m_uiHeightMap);
// Calculate the model matrix
PVRTMat4 mModel = PVRTMat4::Scale(g_CubeScale);
mModel *= PVRTMat4::Translation(g_CubeTranslation);
mModel *= PVRTMat4::RotationY(m_fAngleY);
m_fAngleY += PVRT_PI / 450;
// Set the Model View matrix
PVRTMat4 mMV = m_mView * mModel;
glUniformMatrix4fv(m_ShaderProgram.auiLoc[eModelViewMatrix], 1, GL_FALSE, mMV.ptr());
// Set the ModelViewIT Matrix
PVRTMat4 mMIT = mMV.transpose();
mMIT = mMIT.inverseEx();
PVRTMat3 mMIT3x3 = PVRTMat3(mMIT);
glUniformMatrix3fv(m_ShaderProgram.auiLoc[eNormal], 1, GL_FALSE, mMIT3x3.ptr());
// Set model view projection matrix
PVRTMat4 mMVP = m_mViewProj * mModel;
glUniformMatrix4fv(m_ShaderProgram.auiLoc[eModelViewProj], 1, GL_FALSE, mMVP.ptr());
// Set light position in eye space
PVRTVec4 vEyeSpaceLightPos = m_mView * g_LightPos;
glUniform3fv(m_ShaderProgram.auiLoc[eLightEyeSpacePos], 1, vEyeSpaceLightPos.ptr());
DrawMesh(0);
// Displays the demo name using the tools. For a detailed explanation, see the training course IntroducingPVRTools
m_Print3D.DisplayDefaultTitle("Parallax Bumpmap", "", ePVRTPrint3DSDKLogo);
m_Print3D.Flush();
return true;
}