void vec3Normalize(float* vec, const float* src)
{
float length = vec3Length(src);
vec[0] = src[0]/length;
vec[1] = src[1]/length;
vec[2] = src[2]/length;
}
vec3* vec3Normalize(vec3 *pOut, const vec3 *pV) {
float fLength = vec3Length(pV);
if(fLength != 0) {
pOut->v[0] = pV->v[0] / fLength;
pOut->v[1] = pV->v[1] / fLength;
pOut->v[2] = pV->v[2] / fLength;
}
return pOut;
}
double vec3Normalize(GLfloat *c, const GLfloat *a)
{
double d = vec3Length(a);
if (d > 0) {
vec3DivScalar(c, a, d);
} else {
c[0] = c[1] = c[2] = 0;
}
return d;
}
vec3* vec3Normalize(vec3* pOut, vec3* pIn) {
if (!pIn->x && !pIn->y && !pIn->z)
avec3_assign(pOut, pIn);
float l = 1.0f / vec3Length(pIn);
vec3 v;
v.x = pIn->x * l;
v.y = pIn->y * l;
v.z = pIn->z * l;
pOut->x = v.x;
pOut->y = v.y;
pOut->z = v.z;
return pOut;
}
void drawGlow(Camera *pCam, Player *pTarget, PlayerVisual *pV,
Visual *d, float dim) {
float mat[4*4];
float alpha, dist;
float x, y;
glPushMatrix();
getPositionFromData(&x, &y, pTarget->data);
glTranslatef(x, y, 0);
glDepthMask(GL_FALSE);
glEnable(GL_DEPTH_TEST);
glBlendFunc(GL_SRC_ALPHA, GL_ONE);
glEnable(GL_BLEND);
glGetFloatv(GL_MODELVIEW_MATRIX, mat);
mat[0] = mat[5] = mat[10] = 1.0;
mat[1] = mat[2] = 0.0;
mat[4] = mat[6] = 0.0;
mat[8] = mat[9] = 0.0;
glLoadMatrixf(mat);
{
vec3 v;
v.v[0] = x - pCam->cam[0];
v.v[1] = y - pCam->cam[1];
v.v[2] = 0 - pCam->cam[2];
dist = vec3Length(&v);
}
{
const float fMin = 30;
const float fMax = 100;
if(dist < fMin) alpha = 0.0f;
else if(dist > fMax) alpha = 1.0f;
else alpha = (dist - fMin) / (fMax - fMin);
// printf("dist: %.2f, alpha: %.2f\n", dist, alpha);
}
glBegin(GL_TRIANGLE_FAN);
glColor4f(pV->pColorDiffuse[0],
pV->pColorDiffuse[1],
pV->pColorDiffuse[2],
alpha);
glVertex3f(0,TRAIL_HEIGHT/2, 0);
glColor4f(0,0,0,0.0);
glVertex3d(dim*cos(-0.2*3.1415/5.0),
TRAIL_HEIGHT/2+dim*sin(-0.2*3.1415/5.0), 0);
glVertex3d(dim*cos(1.0*3.1415/5.0),
TRAIL_HEIGHT/2+dim*sin(1.0*3.1415/5.0), 0);
glVertex3d(dim*cos(2.0*3.1415/5.0),
TRAIL_HEIGHT/2+dim*sin(2.0*3.1415/5.0), 0);
glVertex3d(dim*cos(3.0*3.1415/5.0),
TRAIL_HEIGHT/2+dim*sin(3.0*3.1415/5.0), 0);
glVertex3d(dim*cos(4.0*3.1415/5.0),
TRAIL_HEIGHT/2+dim*sin(4.0*3.1415/5.0), 0);
glVertex3d(dim*cos(5.2*3.1415/5.0),
TRAIL_HEIGHT/2+dim*sin(5.2*3.1415/5.0), 0);
glEnd();
polycount += 5;
glBegin(GL_TRIANGLES);
glColor4f(pV->pColorDiffuse[0],
pV->pColorDiffuse[1],
pV->pColorDiffuse[2],
alpha);
glVertex3f(0,TRAIL_HEIGHT/2, 0);
glColor4f(0,0,0,0.0);
glVertex3f(0,-TRAIL_HEIGHT/4,0);
glVertex3d(dim*cos(-0.2f*3.1415/5.0),
TRAIL_HEIGHT/2+dim*sin(-0.2*3.1415/5.0), 0);
glColor4f(pV->pColorDiffuse[0],
pV->pColorDiffuse[1],
pV->pColorDiffuse[2],
alpha);
glVertex3f(0,TRAIL_HEIGHT/2, 0);
glColor4f(0,0,0,0.0);
glVertex3d(dim*cos(5.2*3.1415/5.0),
TRAIL_HEIGHT/2+dim*sin(5.2*3.1415/5.0), 0);
glVertex3f(0,-TRAIL_HEIGHT/4,0);
glEnd();
polycount += 3;
glDepthMask(GL_TRUE);
glEnable(GL_DEPTH_TEST);
glPopMatrix();
}