Vvidget Server ► Dictionary ► Perspective Volume Chart
This section explains how to form an input string for a Perspective Volume Chart such as these:
| Format |
| chart_subtype=0 (Rectilinear) |
The input string has this form:
chart_type=11&chart_subtype=0&chart_format_type=0&title=string&x_title=string&y_title=string&z_title=string&grid_x_length=NX&grid_x_minimum=x0&grid_x_maximum=x1&grid_y_length=NY&grid_y_minimum=y0&grid_y_maximum=y1&grid_z_length=NZ&grid_z_minimum=z0&grid_z_maximum=z1&color_map_1_type=CMT1&color_map_2_type=CMT2&color_map_1_length=CML1&color_map_2_length=CML2&color_map_rgb_11=RRGGBBAA&color_map_rgb_12=RRGGBBAA&color_map_rgb_21=RRGGBBAA&color_map_rgb_22=RRGGBBAA&data_values=A1 A2 ... AN
The following table defines the input string key and value pairs:
| Chart Specific Entries | |
| Key | Value Description |
| chart_type¹ | The chart type is always 11 (aliased to 3D volume), indicating a Perspective Volume Chart. |
| chart_subtype¹ | Always 0 (aliased to linear). |
| chart_format_type¹ | Always 0 (aliased to default). |
| title | The main title of the graph. If this key is not present then the template's title is used. |
| x_title | The x title of the graph. If this key is not present then the template's x-title is used. |
| y_title | The y title of the graph. If this key is not present then the template's y-title is used. |
| z_title | The z title of the graph. If this key is not present then the template's z-title is used. |
| grid_x_length | The number of grid cells in the x-direction. |
| grid_x_minimum | The minimum x-value of the grid. |
| grid_x_maximum | The maximum x-value of the grid. |
| grid_y_length | The number of grid cells in the y-direction. |
| grid_y_minimum | The minimum y-value of the grid. |
| grid_y_maximum | The maximum y-value of the grid. |
| grid_z_length | The number of grid cells in the z-direction. |
| grid_z_minimum | The minimum z-value of the grid. |
| grid_z_maximum | The maximum z-value of the grid. |
| color_map_1_type | The color mapping type (0, 1, 2, 3). |
| color_map_1_length | Number of colors in map 1. |
| color_map_rgb_11 | Beginning color of the color mapping. |
| color_map_rgb_12 | Ending color of the color mapping. |
| color_map_2_type | The color mapping type (0, 1, 2, 3). |
| color_map_2_length | Number of colors in map 2. |
| color_map_rgb_21 | Beginning color of the color mapping. |
| color_map_rgb_22 | Ending color of the color mapping. |
| templates | A custom Templates directory. |
| data_values | A white space delimited list of values representing the density-values of the grid matrix. A density value is a value between zero and one inclusive. See Data Oriented keys for additional information and keys. |
If you incorporate this functionality into your web site please consult Web URL.
You can also modify the following Templates:
| Template Document Names | |
| Template | Description |
| PVST_Perspective_Volume_Chart | Forms the static attributes for the chart. |
| PVST_perspective_volume_color_table | Forms the line colors for odd format type indices. |
| PVST_perspective_volume_color_table_1 | Forms the line colors for even format type indices. |
The following Server Side Attributes define additional non-graphic attributes. A file with this name in the templates directory will alter the parameters that appear in the attribute file.
| Server Side Attributes Names | |
| Name | Description |
| PVST_Perspective_Volume_Chart_attributes | Main server side attributes. |