bool StGLUVCylinder::computeMesh() {
clearRAM();
if(myNbRings == 0) {
return false;
}
const int aNbVerts = (myNbRings + 1) * 2;
myVertices.initArray(aNbVerts);
myNormals .initArray(aNbVerts);
myTCoords .initArray(aNbVerts);
for(int aRingIter = 0; aRingIter <= myNbRings; ++aRingIter) {
const GLfloat aPhi = float(aRingIter) * float(M_PI * 2.0) / float(myNbRings);
const GLfloat aTexCrd = float(aRingIter) / float(myNbRings);
myTCoords.changeValue(aRingIter * 2 + 0) = StGLVec2(aTexCrd, 0.0f);
myTCoords.changeValue(aRingIter * 2 + 1) = StGLVec2(aTexCrd, 1.0f);
const StGLVec3 aNorm(cosf(aPhi), 0.0f, sinf(aPhi));
myNormals.changeValue(aRingIter * 2 + 0) = aNorm;
myNormals.changeValue(aRingIter * 2 + 1) = aNorm;
myVertices.changeValue(aRingIter * 2 + 0) = myCenter + aNorm * myRadius - StGLVec3(0.0f, myHeight * 0.5f, 0.0f);
myVertices.changeValue(aRingIter * 2 + 1) = myCenter + aNorm * myRadius + StGLVec3(0.0f, myHeight * 0.5f, 0.0f);
}
return true;
}
void StGLRootWidget::getRectGl(const StRectI_t& theRectPx,
StArray<StGLVec2>& theVertices,
const size_t theFromId) const {
StRectD_t aRectGl = getRectGl(theRectPx);
theVertices[theFromId + 0] = StGLVec2(GLfloat(aRectGl.right()), GLfloat(aRectGl.top()));
theVertices[theFromId + 1] = StGLVec2(GLfloat(aRectGl.right()), GLfloat(aRectGl.bottom()));
theVertices[theFromId + 2] = StGLVec2(GLfloat(aRectGl.left()), GLfloat(aRectGl.top()));
theVertices[theFromId + 3] = StGLVec2(GLfloat(aRectGl.left()), GLfloat(aRectGl.bottom()));
}
void StGLStereoFrameBuffer::setVPDimensions(StGLContext& theCtx,
const GLsizei theSizeX,
const GLsizei theSizeY) {
GLsizei aVPSizeX = stMin(theSizeX, getSizeX());
GLsizei aVPSizeY = stMin(theSizeY, getSizeY());
if(aVPSizeX != myViewPortX
|| aVPSizeY != myViewPortY) {
GLfloat aDX = GLfloat(aVPSizeX) / GLfloat(getSizeX());
GLfloat aDY = GLfloat(aVPSizeY) / GLfloat(getSizeY());
StArray<StGLVec2> aTCoords(4);
aTCoords[0] = StGLVec2(aDX, 0.0f);
aTCoords[1] = StGLVec2(aDX, aDY);
aTCoords[2] = StGLVec2(0.0f, 0.0f);
aTCoords[3] = StGLVec2(0.0f, aDY);
myTexCoordBuf.init(theCtx, aTCoords);
myViewPortX = aVPSizeX;
myViewPortY = aVPSizeY;
}
}
bool StGLStereoFrameBuffer::init(StGLContext& theCtx,
const GLsizei theTextureSizeX,
const GLsizei theTextureSizeY,
const bool theNeedDepthBuffer) {
// release current objects
release(theCtx);
if(theCtx.arbFbo == NULL) {
return false;
}
// create the textures
if(!StGLStereoTexture::initTrash(theCtx, theTextureSizeX, theTextureSizeY)) {
release(theCtx);
return false;
}
const GLuint aFboBakDraw = theCtx.stglFramebufferDraw();
const GLuint aFboBakRead = theCtx.stglFramebufferRead();
theCtx.stglBindFramebuffer(StGLFrameBuffer::NO_FRAMEBUFFER);
const GLint aDepthFormat = theCtx.isGlGreaterEqual(3, 0) ? GL_DEPTH24_STENCIL8 : GL_DEPTH_COMPONENT16;
if(theNeedDepthBuffer) {
theCtx.arbFbo->glGenRenderbuffers(2, myGLDepthRBIds);
theCtx.arbFbo->glBindRenderbuffer(GL_RENDERBUFFER, myGLDepthRBIds[StGLStereoTexture::LEFT_TEXTURE]);
theCtx.arbFbo->glRenderbufferStorage(GL_RENDERBUFFER, aDepthFormat, theTextureSizeX, theTextureSizeY);
}
// build FBOs
theCtx.arbFbo->glGenFramebuffers(2, myGLFBufferIds);
theCtx.stglBindFramebuffer(myGLFBufferIds[StGLStereoTexture::LEFT_TEXTURE]);
// bind left texture to left FBO as color buffer
theCtx.arbFbo->glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D,
StGLStereoTexture::myTextures[StGLStereoTexture::LEFT_TEXTURE].getTextureId(), 0);
if(theNeedDepthBuffer) {
// bind left render buffer to left FBO as depth buffer
theCtx.arbFbo->glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_RENDERBUFFER,
myGLDepthRBIds[StGLStereoTexture::LEFT_TEXTURE]);
}
bool isOk = theCtx.arbFbo->glCheckFramebufferStatus(GL_FRAMEBUFFER) == GL_FRAMEBUFFER_COMPLETE;
theCtx.arbFbo->glBindRenderbuffer(GL_RENDERBUFFER, StGLFrameBuffer::NO_RENDERBUFFER);
if(!isOk) {
release(theCtx);
theCtx.stglBindFramebufferDraw(aFboBakDraw);
theCtx.stglBindFramebufferRead(aFboBakRead);
return false;
}
theCtx.stglBindFramebuffer(StGLFrameBuffer::NO_FRAMEBUFFER);
if(theNeedDepthBuffer) {
// create right RenderBuffer (will be used as depth buffer)
theCtx.arbFbo->glBindRenderbuffer(GL_RENDERBUFFER, myGLDepthRBIds[StGLStereoTexture::RIGHT_TEXTURE]);
theCtx.arbFbo->glRenderbufferStorage(GL_RENDERBUFFER, aDepthFormat, theTextureSizeX, theTextureSizeY);
}
theCtx.stglBindFramebuffer(myGLFBufferIds[StGLStereoTexture::RIGHT_TEXTURE]);
// bind right texture to rights FBO as color buffer
theCtx.arbFbo->glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D,
StGLStereoTexture::myTextures[StGLStereoTexture::RIGHT_TEXTURE].getTextureId(), 0);
if(theNeedDepthBuffer) {
// bind right render buffer to right FBO as depth buffer
theCtx.arbFbo->glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_RENDERBUFFER,
myGLDepthRBIds[StGLStereoTexture::RIGHT_TEXTURE]);
}
isOk = theCtx.arbFbo->glCheckFramebufferStatus(GL_FRAMEBUFFER) == GL_FRAMEBUFFER_COMPLETE;
theCtx.arbFbo->glBindRenderbuffer(GL_RENDERBUFFER, StGLFrameBuffer::NO_RENDERBUFFER);
theCtx.stglBindFramebufferDraw(aFboBakDraw);
theCtx.stglBindFramebufferRead(aFboBakRead);
if(!isOk) {
release(theCtx);
return false;
}
ST_DEBUG_LOG("OpenGL, created StFrameBuffer(WxH= " + getSizeX() + 'x' + getSizeY() + ')');
// create vertices buffers to draw simple textured quad
StArray<StGLVec4> aQuad(4);
aQuad[0] = StGLVec4( 1.0f, -1.0f, 0.0f, 1.0f); // top-right
aQuad[1] = StGLVec4( 1.0f, 1.0f, 0.0f, 1.0f); // bottom-right
aQuad[2] = StGLVec4(-1.0f, -1.0f, 0.0f, 1.0f); // top-left
aQuad[3] = StGLVec4(-1.0f, 1.0f, 0.0f, 1.0f); // bottom-left
myVerticesBuf.init(theCtx, aQuad);
StArray<StGLVec2> aQuadTC(4);
aQuadTC[0] = StGLVec2(1.0f, 0.0f);
aQuadTC[1] = StGLVec2(1.0f, 1.0f);
aQuadTC[2] = StGLVec2(0.0f, 0.0f);
aQuadTC[3] = StGLVec2(0.0f, 1.0f);
myTexCoordBuf.init(theCtx, aQuadTC);
myViewPortX = theTextureSizeX;
myViewPortY = theTextureSizeY;
return true;
}
void StGeometryTest::resizeGrid(const StRectI_t& winRectPx) {
StGLContext& aCtx = getContext();
// grid
size_t linesCountV = 16 + 1;
size_t cellSizePx = 10;
size_t linesCountH = 16 + 1;
if(winRectPx.width() > winRectPx.height()) {
cellSizePx = winRectPx.width() / (linesCountV - 1);
linesCountH = (winRectPx.height() / cellSizePx) + 1;
} else {
cellSizePx = winRectPx.height() / (linesCountH - 1);
linesCountV = (winRectPx.width() / cellSizePx) + 1;
}
myCellSize.x() = 2.0f * GLfloat(cellSizePx) / GLfloat(winRectPx.width());
myCellSize.y() = 2.0f * GLfloat(cellSizePx) / GLfloat(winRectPx.height());
size_t vertixesCount = (linesCountH + linesCountV) * 2;
StArray<StGLVec4> vertArray(vertixesCount);
// insert black gap to make quads
StGLVec2 blackGap(GLfloat(winRectPx.width() - cellSizePx * (linesCountV - 1)) / GLfloat(winRectPx.width()),
GLfloat(winRectPx.height() - cellSizePx * (linesCountH - 1)) / GLfloat(winRectPx.height()));
StGLVec2 bottomLeft = StGLVec2(-1.0f) + blackGap;
StGLVec2 fat = StGLVec2( 2.0f) - blackGap * 2.0f;
// horizontal lines
for(size_t lineId = 0; lineId < linesCountH; ++lineId) {
GLfloat anY = bottomLeft.y() + fat.y() * (GLfloat(lineId) / GLfloat(linesCountH - 1));
vertArray[2 * lineId] = StGLVec4(-1.0f, anY, 0.0f, 1.0f);
vertArray[2 * lineId + 1] = StGLVec4( 1.0f, anY, 0.0f, 1.0f);
}
// vertical lines
for(size_t lineId = 0; lineId < linesCountV; ++lineId) {
GLfloat anX = bottomLeft.x() + fat.x() * (GLfloat(lineId) / GLfloat(linesCountV - 1));
vertArray[2 * linesCountH + 2 * lineId] = StGLVec4(anX, -1.0f, 0.0f, 1.0f);
vertArray[2 * linesCountH + 2 * lineId + 1] = StGLVec4(anX, 1.0f, 0.0f, 1.0f);
}
myGrid.changeVBO(ST_VBO_VERTEX)->init(aCtx, vertArray);
// white color
StArray<StGLVec4> lColorsArray(vertixesCount, StGLVec4(1.0f));
myGrid.changeVBO(ST_VBO_COLORS)->init(aCtx, lColorsArray);
// bottom left circle
myCircles[0].create(StGLVec3(bottomLeft + myCellSize),
myCellSize.x(), myCellSize.y(), 64);
// bottom right circle
myCircles[1].create(StGLVec3(bottomLeft + myCellSize * StGLVec2(GLfloat(linesCountV - 2), 1.0f)),
myCellSize.x(), myCellSize.y(), 64);
// top left circle
myCircles[2].create(StGLVec3(bottomLeft + myCellSize * StGLVec2(1.0f, GLfloat(linesCountH - 2))),
myCellSize.x(), myCellSize.y(), 64);
// top right circle
myCircles[3].create(StGLVec3(bottomLeft + myCellSize * StGLVec2(GLfloat(linesCountV - 2), GLfloat(linesCountH - 2))),
myCellSize.x(), myCellSize.y(), 64);
// center circle
GLfloat minSize = 0.5f * (((linesCountV < linesCountH) ? linesCountV : linesCountH) - 1);
myCircles[4].create(StGLVec3(0.0f),
myCellSize.x() * minSize, myCellSize.y() * minSize, 64);
// white color
for(size_t aCircleId = 0; aCircleId < 5; ++aCircleId) {
myCircles[aCircleId].computeMesh();
myCircles[aCircleId].initColorsArray(StGLVec4(1.0f));
myCircles[aCircleId].initVBOs(aCtx);
}
}