void Choreo3DApp::setupEnviron( int xSize, int zSize, int spacing )
{
CI_ASSERT( ( spacing <= xSize ) && ( spacing <= zSize ) );
// Cut in half and adjust for spacing.
xSize = ( ( xSize / 2 ) / spacing ) * spacing;
zSize = ( ( zSize / 2 ) / spacing ) * spacing;
const int xMax = xSize + spacing;
const int zMax = zSize + spacing;
// const ColorA defaultColor( 0.9f, 0.9f, 0.9f,0.1f);
gridColor = ColorA( 0.9f, 0.9f, 0.9f,0.1f);
const ColorA black( 0, 0, 0, 1 );
mGridMesh = gl::VertBatch::create( GL_LINES );
// Add x lines.
for( int xVal = -xSize; xVal < xMax; xVal += spacing ) {
mGridMesh->color( gridColor );
mGridMesh->vertex( (float)xVal, 0, (float)-zSize );
mGridMesh->vertex( (float)xVal, 0, (float)zSize );
}// end for each x dir line
// Add z lines.
for( int zVal = -zSize; zVal < zMax; zVal += spacing ) {
mGridMesh->color( gridColor );
mGridMesh->vertex( (float)xSize, 0, (float)zVal );
mGridMesh->vertex( (float)-xSize, 0, (float)zVal );
}// end for each z dir line
//SETUP THE CAMERA
mCamera.lookAt( vec3( 500, 500, 0 ), vec3( 0 ) );
mCamera.setEyePoint(vec3(500,1000,0));
mCamera.setFarClip(20000);
}
void TessellationShaderApp::setup()
{
mTessLevelInner = mTessLevelOuter = 4;
int maxPatchVertices = 0;
glGetIntegerv( GL_MAX_PATCH_VERTICES, &maxPatchVertices );
app::console() << "Max supported patch vertices " << maxPatchVertices << std::endl;
#if ! defined( CINDER_GL_ES )
fs::path glDir = "ogl";
mRadius = 200.0f;
mParams = params::InterfaceGl::create( "Settings", ivec2( 200, 200 ) );
mParams->addParam( "Radius", &mRadius, "step=1.0" );
mParams->addParam( "Tess level inner", &mTessLevelInner, "min=0" );
mParams->addParam( "Tess level outer", &mTessLevelOuter, "min=0" );
#else
fs::path glDir = "es31a";
mRadius = 400.0f;
#endif
try {
mGlsl = gl::GlslProg::create( gl::GlslProg::Format()
.vertex( loadAsset( glDir / "0_vert.glsl" ) )
.tessellationCtrl( loadAsset( glDir / "1_tess_ctrl.glsl" ) )
.tessellationEval( loadAsset( glDir / "2_tess_eval.glsl" ) )
#if defined( CINDER_GL_ES )
.geometry( loadAsset( glDir / "x_geom.glsl" ) )
#endif
.fragment( loadAsset( glDir / "3_frag.glsl" ) ) );
}
catch( const std::exception &ex ) {
console() << ex.what() << endl;
//quit();
}
mBatch = gl::VertBatch::create( GL_PATCHES );
mBatch->color( 1.0f, 0.0f, 0.0f );
mBatch->vertex( vec2( 1, -1 ) );
mBatch->color( 0.0f, 1.0f, 0.0f );
mBatch->vertex( vec2( 0 , 1 ) );
mBatch->color( 0.0f, 0.0f, 1.0f );
mBatch->vertex( vec2( -1, -1 ) );
gl::patchParameteri( GL_PATCH_VERTICES, 3 );
}
void GeometryApp::createGrid()
{
mGrid = gl::VertBatch::create( GL_LINES );
mGrid->begin( GL_LINES );
for( int i = -10; i <= 10; ++i ) {
mGrid->color( Color( 0.25f, 0.25f, 0.25f ) );
mGrid->color( Color( 0.25f, 0.25f, 0.25f ) );
mGrid->color( Color( 0.25f, 0.25f, 0.25f ) );
mGrid->color( Color( 0.25f, 0.25f, 0.25f ) );
mGrid->vertex( float( i ), 0.0f, -10.0f );
mGrid->vertex( float( i ), 0.0f, +10.0f );
mGrid->vertex( -10.0f, 0.0f, float( i ) );
mGrid->vertex( +10.0f, 0.0f, float( i ) );
}
mGrid->end();
}
void GeometryShaderIntroApp::setup()
{
mNumSides = 2;
mRadius = 100;
// setup shader
try {
mGlsl = gl::GlslProg::create( gl::GlslProg::Format().vertex( loadAsset( "basic.vert" ) )
.fragment( loadAsset( "basic.frag" ) )
.geometry( loadAsset( "basic.geom" ) ) );
}
catch( gl::GlslProgCompileExc ex ) {
cout << ex.what() << endl;
quit();
}
// setup VertBatch with a single point at the origin
mBatch = gl::VertBatch::create();
mBatch->vertex( vec2( 0 ) );
mBatch->color( 1, 0, 0 );
}
void ImmediateModeApp::draw()
{
gl::clear();
gl::VertBatch vb( GL_TRIANGLES );
vb.color( 1, 0, 0 );
vb.vertex( getWindowWidth() / 2, 50 );
vb.color( 0, 1, 0 );
vb.vertex( getWindowWidth() - 50, getWindowHeight() - 50 );
vb.color( 0, 0, 1 );
vb.vertex( 50, getWindowHeight() - 50 );
vb.draw();
// draw
mBatch->begin( GL_LINE_STRIP );
for( const vec2 &point : mPoints ) {
mBatch->vertex( vec4( point, 0, 1 ), Color( 1.0f, 0.5f, 0.25f ) );
}
mBatch->draw();
}