com.gempukku.libgdx.graph.shader.common.shape.EllipseShapeShaderNodeBuilder Maven / Gradle / Ivy

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package com.gempukku.libgdx.graph.shader.common.shape;

import com.badlogic.gdx.utils.JsonValue;
import com.badlogic.gdx.utils.ObjectMap;
import com.badlogic.gdx.utils.ObjectSet;
import com.gempukku.libgdx.graph.shader.GraphShader;
import com.gempukku.libgdx.graph.shader.GraphShaderContext;
import com.gempukku.libgdx.graph.shader.ShaderFieldType;
import com.gempukku.libgdx.graph.shader.builder.CommonShaderBuilder;
import com.gempukku.libgdx.graph.shader.config.common.shape.EllipseShapeShaderNodeConfiguration;
import com.gempukku.libgdx.graph.shader.node.ConfigurationCommonShaderNodeBuilder;
import com.gempukku.libgdx.graph.shader.node.DefaultFieldOutput;
import com.gempukku.libgdx.graph.util.LibGDXCollections;

public class EllipseShapeShaderNodeBuilder extends ConfigurationCommonShaderNodeBuilder {
    public EllipseShapeShaderNodeBuilder() {
        super(new EllipseShapeShaderNodeConfiguration());
    }

    @Override
    protected ObjectMap buildCommonNode(boolean designTime, String nodeId, JsonValue data, ObjectMap inputs, ObjectSet producedOutputs, CommonShaderBuilder commonShaderBuilder, GraphShaderContext graphShaderContext, GraphShader graphShader) {
        FieldOutput uvValue = inputs.get("uv");
        FieldOutput sizeValue = inputs.get("size");
        FieldOutput borderValue = inputs.get("border");
        if (sizeValue != null && sizeValue.getFieldType() == ShaderFieldType.Float)
            sizeValue = new DefaultFieldOutput(ShaderFieldType.Vector2, "vec2(" + sizeValue.getRepresentation() + ")");

        String uv = uvValue.getRepresentation();
        String size = sizeValue != null ? sizeValue.getRepresentation() : "vec2(1.0)";
        String border = borderValue != null ? borderValue.getRepresentation() : "0.0";

        commonShaderBuilder.addMainLine("// Ellipse shape node");
        String temp1 = "temp_" + nodeId;
        String name = "result_" + nodeId;
        ShaderFieldType resultType = ShaderFieldType.Float;

        commonShaderBuilder.addMainLine("vec2 " + temp1 + " = " + uv + " * 2.0 - 1.0;");
        commonShaderBuilder.addMainLine(resultType.getShaderType() + " " + name + " = 1.0 - smoothstep(0.0 - " + border + ", 0.0,  length(" + temp1 + " / " + size + ") - 1.0);");

        return LibGDXCollections.singletonMap("output", new DefaultFieldOutput(ShaderFieldType.Float, name));
    }
}