cdkbook

CTR2.groovy

Source code:

@Grab(group='org.openscience.cdk', module='cdk-bundle', version='2.9')

import java.util.List;
import java.awt.*;
import java.awt.image.*;
import javax.imageio.*;
import org.openscience.cdk.silent.*;
import org.openscience.cdk.interfaces.*;
import org.openscience.cdk.layout.*;
import org.openscience.cdk.renderer.*;
import org.openscience.cdk.renderer.font.*;
import org.openscience.cdk.renderer.generators.*;
import org.openscience.cdk.renderer.visitor.*;
import org.openscience.cdk.smiles.SmilesParser;
import org.openscience.cdk.templates.*;
import org.openscience.cdk.renderer.generators.BasicSceneGenerator.Margin;
import org.openscience.cdk.renderer.generators.BasicSceneGenerator.ZoomFactor;




smiles = "CN1C=NC2=C1C(=O)N(C(=O)N2C)C"
int WIDTH = 200
int HEIGHT = 250
Rectangle drawArea = new Rectangle(WIDTH, HEIGHT);
Image image = new BufferedImage(
  WIDTH, HEIGHT, BufferedImage.TYPE_INT_RGB
);
smilesParser = new SmilesParser(
  SilentChemObjectBuilder.getInstance()
)
molecule = smilesParser.parseSmiles(smiles)
StructureDiagramGenerator sdg =
  new StructureDiagramGenerator();
sdg.setMolecule(molecule);
sdg.generateCoordinates();
molecule = sdg.getMolecule();
List<IGenerator> generators =
  new ArrayList<IGenerator>();
generators.add(new BasicSceneGenerator());
generators.add(new BasicBondGenerator());
generators.add(new BasicAtomGenerator());
AtomContainerRenderer renderer =
  new AtomContainerRenderer(
    generators, new AWTFontManager()
  );
renderer.setup(molecule, drawArea);
model = renderer.getRenderer2DModel();
model.set(ZoomFactor.class, (double)0.9);
Graphics2D g2 = (Graphics2D)image.getGraphics();
g2.setColor(Color.WHITE);
g2.fillRect(0, 0, WIDTH, HEIGHT);
renderer.paint(molecule, new AWTDrawVisitor(g2));
ImageIO.write(
  (RenderedImage)image, "PNG",
  new File("CTR2.png")
);

Output:

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