//=========================================================
//
// Instead of a texured plane,
// draw a hexagon based grid
//
//=========================================================
static void draw_hex(void)
{
float size = HEX_SIZE;
float height = HEX_HEIGHT;
float x_1 = WORLD_X_MIN;
float x_2 = WORLD_X_MAX;
float y_1 = WORLD_Y_MIN;
float y_2 = WORLD_Y_MAX;
float offset=0.0f;
bool s_flag = false;
float i = 0.0f;
glBegin(GL_TRIANGLES);
for (i = y_1; i < y_2; i += height)
{
draw_hexplane(x_1-offset, x_2, i, size);
if (s_flag == true) {
offset=size;
s_flag = false;
} else {
offset = 0.0f;
s_flag = true;
} // end of the if
} // end of the for
glEnd();
} // end of the function
void draw_hexcube(void)
{
a += da;
if(a >= 720.) /* depends on slowest rotation factor */
a = 0.;
/* draw hexplanes, without changing z-values */
glDepthMask(GL_FALSE);
glDisable(GL_DEPTH_TEST);
/* x-y plane */
glColor3f(0.2, 0.2, 0.6);
glPushMatrix();
glTranslatef(cubeoffx, cubeoffy, cubeoffz);
glScalef(CUBESCALE, CUBESCALE, CUBESCALE);
draw_hexplane();
glPopMatrix();
/* x-y plane, translated */
glPushMatrix();
glTranslatef(cubeoffx, cubeoffy, cubeoffz - 2*CUBESIDE);
glScalef(CUBESCALE, CUBESCALE, CUBESCALE);
draw_hexplane();
glPopMatrix();
glColor3f(0.6, 0.2, 0.2);
/* x-z plane, translate low */
glPushMatrix();
glRotatef(90, 1.0, 0.0, 0.0);
glTranslatef(cubeoffx, cubeoffz - CUBESIDE, -cubeoffy + CUBESIDE);
glScalef(CUBESCALE, CUBESCALE, CUBESCALE);
draw_hexplane();
glPopMatrix();
/* x-z plane, translate high */
glPushMatrix();
glRotatef(90, 1.0, 0.0, 0.0);
glTranslatef(cubeoffx, cubeoffz - CUBESIDE, -cubeoffy - CUBESIDE);
glScalef(CUBESCALE, CUBESCALE, CUBESCALE);
draw_hexplane();
glPopMatrix();
glColor3f(0.2, 0.6, 0.2);
/* y-z plane, translate low */
glPushMatrix();
glRotatef(90, 0.0, 1.0, 0.0);
glTranslatef(-cubeoffz + CUBESIDE, cubeoffy, cubeoffx + CUBESIDE);
glScalef(CUBESCALE, CUBESCALE, CUBESCALE);
draw_hexplane();
glPopMatrix();
/* y-z plane, translate high */
glPushMatrix();
glRotatef (90, 0.0, 1.0, 0.0);
glTranslatef(-cubeoffz + CUBESIDE, cubeoffy, cubeoffx - CUBESIDE);
glScalef(CUBESCALE, CUBESCALE, CUBESCALE);
draw_hexplane();
glPopMatrix();
glFlush();
glDepthMask(GL_TRUE);
glEnable(GL_DEPTH_TEST);
}
