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cmd_drawpol |
Function (ROM Call 0x344) |
Executes TI-Basic 'DrawPol' command.
cmd_drawpol displays the Graph Screen and draws a polar graph, using
the Greek letter "theta" as the independent variable. This function expects
one of the following eight layouts on the expression stack:
The parameter ExprList should point to the tag of the last item.
expr is the expression which defines the polar graph. thmin,
thmax and thstep are floating point items which determine
the starting value, the ending value, and the increment of the independent
variable "theta" which will be used for drawing.
If the current graphing mode is not polar, only the first layout is valid.
Otherwise, the omitted expressions will be picked from the current settings
of the "thetamin", "thetamax"
and "thetastep" system variables in the
"Window Editor" application (note that "theta" means a Greek letter theta, not
an actual string "theta").
Uses: ER_catch, ER_success, ER_throwVar, next_expression_index, push_expression, push_Float, push_quantum, top_estack, gr_active, StepCk, OSCheckBreak, is_transfinite, round14, sincos, CptIndep, ForceFloat, GraphActivate, GrLineFlt, QSkipGraphErr, _bcd_math
See also: cmd_drawparm, cmd_drawfunc