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Examples

// Simple stage to change the color
var fs =
    'uniform sampler2D colorTexture;\n' +
    'varying vec2 v_textureCoordinates;\n' +
    'uniform float scale;\n' +
    'uniform vec3 offset;\n' +
    'void main() {\n' +
    '    vec4 color = texture2D(colorTexture, v_textureCoordinates);\n' +
    '    gl_FragColor = vec4(color.rgb * scale + offset, 1.0);\n' +
    '}\n';
scene.postProcessStages.add(new bmgl.PostProcessStage({
    fragmentShader : fs,
    uniforms : {
        scale : 1.1,
        offset : function() {
            return new bmgl.Cartesian3(0.1, 0.2, 0.3);
        }
    }
}));

// Simple stage to change the color of what is selected.
// If czm_selected returns true, the current fragment belongs to geometry in the selected array.
var fs =
    'uniform sampler2D colorTexture;\n' +
    'varying vec2 v_textureCoordinates;\n' +
    'uniform vec4 highlight;\n' +
    'void main() {\n' +
    '    vec4 color = texture2D(colorTexture, v_textureCoordinates);\n' +
    '    if (czm_selected()) {\n' +
    '        vec3 highlighted = highlight.a * highlight.rgb + (1.0 - highlight.a) * color.rgb;\n' +
    '        gl_FragColor = vec4(highlighted, 1.0);\n' +
    '    } else { \n' +
    '        gl_FragColor = color;\n' +
    '    }\n' +
    '}\n';
var stage = scene.postProcessStages.add(new bmgl.PostProcessStage({
    fragmentShader : fs,
    uniforms : {
        highlight : function() {
            return new bmgl.Color(1.0, 0.0, 0.0, 0.5);
        }
    }
}));
stage.selected = [bm3DTileFeature];