vec2 pt_last;

vec4 col_last;

vec2 mid = (pos1 - pos2) * 0.5f;

vec2 to = vec2(pos1 - spos);

//TODO: not sure this makes any sense

//float dp = std::min(1.0f, to.normal().dot(mid.normal()));

float dp = std::min(1.0f, glm::dot(normalise(to), normalise(mid)) );

float ang = acos(dp) / PI;

int edge_detail = std::min(10, (int) (ang * 100.0));

if(edge_detail<1) edge_detail = 1;

spline_point.clear();

spline_colour.clear();

spline_point.reserve(edge_detail+1);

spline_colour.reserve(edge_detail+1);

//calculate positions

for(int i=0; i <= edge_detail; i++) {

float t = (float)i/edge_detail;

float tt = 1.0f-t;

vec2 p0 = pos1 * t + spos * tt;

vec2 p1 = spos * t + pos2 * tt;

vec2 pt = p0 * t + p1 * tt;

vec4 coln = col1 * t + col2 * tt;

spline_point.push_back(pt);

spline_colour.push_back(coln);

}

midpoint = pos1 * 0.25f + pos2 * 0.25f + spos * 0.5f;

int edges_count = spline_point.size() - 1;

for(int i=0; i < edges_count; i++) {

//vec2 perp = (spline_point[i] - spline_point[i+1]).perpendicular().normal() * 2.5f;

vec2 perp = (spline_point[i] - spline_point[i+1]);

perp = normalise(vec2(-perp.y, perp.x)) * 2.5f;

quadbuf_vertex v1(spline_point[i] + perp, spline_colour[i], vec2(1.0f, 0.0f));

quadbuf_vertex v2(spline_point[i] - perp, spline_colour[i], vec2(0.0f, 0.0f));

quadbuf_vertex v3(spline_point[i+1] - perp, spline_colour[i+1], vec2(0.0f, 0.0f));

quadbuf_vertex v4(spline_point[i+1] + perp, spline_colour[i+1], vec2(1.0f, 0.0f));

buffer.add(0, v1, v2, v3, v4);

}

//vec2 perp = (pos1 - pos2).perpendicular().normal() * radius;

vec2 perp = (pos1 - pos2);

perp = normalise(vec2(-perp.y, perp.x)) * radius;

// src point

if(first) {

glColor4fv(glm::value_ptr(col1));

glTexCoord2f(1.0,0.0);

glVertex2f(pos1.x + perp.x, pos1.y + perp.y);

glTexCoord2f(0.0,0.0);

glVertex2f(pos1.x - perp.x, pos1.y - perp.y);

}

// dest point

glColor4fv(glm::value_ptr(col2));

glTexCoord2f(1.0,0.0);

glVertex2f(pos2.x + perp.x, pos2.y + perp.y);

glTexCoord2f(0.0,0.0);

glVertex2f(pos2.x - perp.x, pos2.y - perp.y);

int edges_count = spline_point.size() - 1;

vec2 offset(2.0, 2.0);

glBegin(GL_QUAD_STRIP);

for(int i=0;i<edges_count;i++) {

drawBeam(spline_point[i] + offset, vec4(0.0, 0.0, 0.0, gGourceShadowStrength), spline_point[i+1] + offset, vec4(0.0, 0.0, 0.0, gGourceShadowStrength), 2.5, i==0);

}

glEnd();

int edges_count = spline_point.size() - 1;

glBegin(GL_QUAD_STRIP);

for(int i=0;i<edges_count;i++) {

drawBeam(spline_point[i], spline_colour[i], spline_point[i+1], spline_colour[i+1], 2.5, i==0);

}

glEnd();