Thanks fixed.
Also changing #define resolution to res fixed problem as well.
Sent from my iPhone
On 14/07/2011, at 11:28 PM, Ivan Dryanovski <
ivan.dryanovski@gmail.com> wrote:
> This is mostly a shot in the dark, but have you tried removing the
> #defines and using const doubles?
>
> Ivan
>
> On Thu, Jul 14, 2011 at 4:49 AM, Steven Martin <steven.martin@qut.edu.au> wrote:
>> Hi Guys,
>>
>> I am just trying to set the resolution in my Occupancy Grid message.
>>
>> nav_msgs::OccupancyGrid costmap;
>> costmap.info.resolution = 1.0;
>>
>> but I get this compile error
>>
>> /src/costmap.cpp: In function ‘void chatterCallback(const sensor_msgs::LaserScan_<std::allocator<void> >::ConstPtr&)’:
>> /src/costmap.cpp:19:18: error: expected unqualified-id before numeric constant
>> /src/costmap.cpp:19:18: error: expected ‘;’ before numeric constant
>>
>>
>> Any ideas? One of the other students in the lab had a similar issue with setting "g" in a rgb colour message. "r" and "b" could set but "g" threw the same error. Interestingly both were Float32 message variables.
>>
>>
>> Steve
>>
>> -----------------------------------
>>
>> #include "ros/ros.h"
>> #include "sensor_msgs/LaserScan.h"
>> #include "nav_msgs/OccupancyGrid.h"
>> #include "nav_msgs/MapMetaData.h"
>>
>> #include <math.h>
>> #include <iostream>
>>
>> #define resolution 0.5
>> #define size 30 //+10m , -10m
>> const int length = size/resolution;
>> ros::Publisher costmap_pub;
>>
>>
>> void chatterCallback(const sensor_msgs::LaserScan::ConstPtr& msg)
>> {
>> nav_msgs::OccupancyGrid costmap;
>> costmap.data.resize(length*length,0);
>> costmap.info.resolution = 1.0;
>> costmap.info.width = length;
>> costmap.info.height = length;
>> costmap.header.stamp = ros::Time::now();
>>
>> float angle = msg->angle_min;
>> int points = (int)(msg->angle_max - msg->angle_min)/msg->angle_increment;
>>
>>
>> ....
>>
>>
>>
>>
>> Steven Martin
>> steven.martin@qut.edu.au
>>
>> PhD Student
>> Queensland University of Technology
>> Gardens Point, S1107
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>>
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