void SludgeZBufferMaker::on_spinbutton_value_changed(GtkSpinButton *theSpinButton)
{
if (buffer() && bufferY() != backdrop.sprites[buffer()].special) {
backdrop.sprites[buffer()].special = bufferY();
setFileChanged();
}
render_timer_event(theDrawingarea);
}
void AxisRenderer::drawGrid(int gridSize, QGLShaderProgram &program,const AxisCamera &camera)
{
qDebug()<< "[AxisRender] Drawing Grid";
int gridNumber = camera.getGridFactor() * 2; //double size of grid to ensure it covers entire view
float lineLimit = gridNumber * gridSize; //bounds of grid for this size and number
qDebug()<< "[AxisRender] lineLimit = " << lineLimit;
//general xline for grid
float lineX[] = {lineLimit, 0.0f, 0.0f, 1.0f,
-lineLimit, 0.0f, 0.0f, 1.0f};
//general yline for grid
float lineY[] = { 0.0f, lineLimit, 0.0f, 1.0f,
0.0f, -lineLimit, 0.0f, 1.0f};
//general zline for grid
float lineZ[] = {0.0f, 0.0f, lineLimit, 1.0f,
0.0f, 0.0f, -lineLimit, 1.0f};
//bind and fill xline buffer
program.bind();
QGLBuffer bufferX(QGLBuffer::VertexBuffer);
bufferX.setUsagePattern(QGLBuffer::StaticDraw);
bufferX.create();
bufferX.bind();
bufferX.allocate(lineX,sizeof(lineX));
//bind and fill yline buffer
QGLBuffer bufferY(QGLBuffer::VertexBuffer);
bufferY.setUsagePattern(QGLBuffer::StaticDraw);
bufferY.create();
bufferY.bind();
bufferY.allocate(lineY, sizeof(lineY));
//bind and fill zline buffer
QGLBuffer bufferZ(QGLBuffer::VertexBuffer);
bufferZ.setUsagePattern(QGLBuffer::StaticDraw);
bufferZ.create();
bufferZ.bind();
bufferZ.allocate(lineZ, sizeof(lineZ));
QMatrix4x4 mvp;
QMatrix4x4 vp = camera.getProjMatrix();
QMatrix4x4 m;
//find the offest based on camera position
QVector3D pos = camera.getPosistion();
int xoff = pos.x() / gridSize;
int yoff = pos.y() / gridSize;
int zoff = pos.z() / gridSize;
//set color uniform to grey
QVector4D color(0.3f, 0.3f, 0.3f, 1.0f);
program.setUniformValueArray("color", &color, 1);
//draw each line
program.enableAttributeArray("vertex");
for(int i = -gridNumber; i <= gridNumber; ++i){
//x lines only for XY and XZ Axis
if(camera.getLock() == XY || camera.getLock() == XZ)
{
bufferX.bind();
program.setAttributeBuffer("vertex", GL_FLOAT, 0, 4);
//use model matrix to translate each line with offset
m.setToIdentity();
m.translate(0.0f + (xoff * gridSize), (i + yoff) * gridSize, (i + zoff) * gridSize);
mvp = vp * m ;//set mvp up
//set mvp uniform then draw
program.setUniformValueArray("modelToCamera", &mvp, 1);
glDrawArrays(GL_LINES, 0, 2);
}
//y lines for XY and YZ axis only
if(camera.getLock() == XY || camera.getLock() == YZ)
{
bufferY.bind();
program.setAttributeBuffer("vertex", GL_FLOAT, 0, 4);
//use model matrix to translate each line with offset
m.setToIdentity();
m.translate((i + xoff) * gridSize, 0.0f + (yoff * gridSize) ,(i + zoff) * gridSize);
mvp = vp * m;
//set mvp uniform and draw
program.setUniformValueArray("modelToCamera", &mvp, 1);
glDrawArrays(GL_LINES, 0, 2);
}
//z lines
if(camera.getLock() == XZ || camera.getLock() == YZ)
{
bufferZ.bind();
program.setAttributeBuffer("vertex", GL_FLOAT, 0, 4);
//use model matrix to translate each line with offset
m.setToIdentity();
m.translate((i + xoff) * gridSize, (i + yoff) * gridSize ,0.0f + (zoff * gridSize));
mvp = vp * m;
//set mvp uniform then draw
program.setUniformValueArray("modelToCamera", &mvp, 1);
glDrawArrays(GL_LINES, 0, 2);
}
}
}
