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Created a drawVector() call that will draw a vector in 3-space with axes for testing

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This commit is contained in:
Philip Rosedale 2013-05-06 16:18:27 -07:00
parent 3b3e6ae075
commit ff88d1fc06
3 changed files with 37 additions and 26 deletions
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50
interface/src/Util.cpp
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@ -65,46 +65,47 @@ float angle_to(glm::vec3 head_pos, glm::vec3 source_pos, float render_yaw, float
return atan2(head_pos.x - source_pos.x, head_pos.z - source_pos.z) * 180.0f / PIf + render_yaw + head_yaw;
}
void render_vector(glm::vec3 * vec)
// Draw a 3D vector floating in space
void drawVector(glm::vec3 * vector)
{
// Show edge of world
glDisable(GL_LIGHTING);
glColor4f(1.0, 1.0, 1.0, 1.0);
glLineWidth(1.0);
glBegin(GL_LINES);
glEnable(GL_POINT_SMOOTH);
glPointSize(3.0);
glLineWidth(2.0);
// Draw axes
glBegin(GL_LINES);
glColor3f(1,0,0);
glVertex3f(-1,0,0);
glVertex3f(0,0,0);
glVertex3f(1,0,0);
glColor3f(0,1,0);
glVertex3f(0,-1,0);
glVertex3f(0,0,0);
glVertex3f(0, 1, 0);
glColor3f(0,0,1);
glVertex3f(0,0,-1);
glVertex3f(0,0,0);
glVertex3f(0, 0, 1);
// Draw vector
glEnd();
// Draw the vector itself
glBegin(GL_LINES);
glColor3f(1,1,1);
glVertex3f(0,0,0);
glVertex3f(vec->x, vec->y, vec->z);
// Draw marker dots for magnitude
glVertex3f(vector->x, vector->y, vector->z);
glEnd();
float particleAttenuationQuadratic[] = { 0.0f, 0.0f, 2.0f }; // larger Z = smaller particles
float particleAttenuationConstant[] = { 1.0f, 0.0f, 0.0f };
glPointParameterfvARB( GL_POINT_DISTANCE_ATTENUATION_ARB, particleAttenuationQuadratic );
glEnable(GL_POINT_SMOOTH);
glPointSize(10.0);
glBegin(GL_POINTS);
// Draw spheres for magnitude
glPushMatrix();
glColor3f(1,0,0);
glVertex3f(vec->x,0,0);
glTranslatef(vector->x,0,0);
glutSolidSphere(0.02, 10, 10);
glColor3f(0,1,0);
glVertex3f(0,vec->y,0);
glTranslatef(-vector->x, vector->y, 0);
glutSolidSphere(0.02, 10, 10);
glColor3f(0,0,1);
glVertex3f(0,0,vec->z);
glEnd();
glTranslatef(0, -vector->y, vector->z);
glutSolidSphere(0.02, 10, 10);
glPopMatrix();
glPointParameterfvARB( GL_POINT_DISTANCE_ATTENUATION_ARB, particleAttenuationConstant );
}
void render_world_box()
@ -184,7 +185,6 @@ void drawtext(int x, int y, float scale, float rotate, float thick, int mono,
}
void drawvec3(int x, int y, float scale, float rotate, float thick, int mono, glm::vec3 vec,
float r, float g, float b)
{
@ -209,7 +209,7 @@ void drawvec3(int x, int y, float scale, float rotate, float thick, int mono, gl
}
glPopMatrix();
}
}
void drawGroundPlaneGrid(float size)
{

4
interface/src/Util.h
View file

@ -33,13 +33,15 @@ float angle_to(glm::vec3 head_pos, glm::vec3 source_pos, float render_yaw, float
float randFloat();
void render_world_box();
void render_vector(glm::vec3 * vec);
int widthText(float scale, int mono, char const* string);
float widthChar(float scale, int mono, char ch);
void drawtext(int x, int y, float scale, float rotate, float thick, int mono,
char const* string, float r=1.0, float g=1.0, float b=1.0);
void drawvec3(int x, int y, float scale, float rotate, float thick, int mono, glm::vec3 vec,
float r=1.0, float g=1.0, float b=1.0);
void drawVector(glm::vec3* vector);
double diffclock(timeval *clock1,timeval *clock2);
void drawGroundPlaneGrid(float size);

9
interface/src/main.cpp
View file

@ -1081,6 +1081,15 @@ void display(void)
// important...
myCamera.update( 1.f/FPS );
// Render anything (like HUD items) that we want to be in 3D but not in worldspace
const float HUD_Z_OFFSET = -5.f;
glPushMatrix();
glm::vec3 test(0.5, 0.5, 0.5);
glTranslatef(1, 1, HUD_Z_OFFSET);
drawVector(&test);
glPopMatrix();
// Note: whichCamera is used to pick between the normal camera myCamera for our
// main camera, vs, an alternate camera. The alternate camera we support right now