bool Polygon::EqualBaseAngles() const { //checks for a pair of equal base angles (isosceles)
double angle_1, angle_2;
for (unsigned int i=0;i<points.size();i++) {
if (i==points.size()-1) {
angle_1 = Angle(points[i],points[0],points[1]);
angle_2 = Angle(points[0],points[1],points[2]);
}
else if (i==points.size()-2) {
angle_1 = Angle(points[i],points[i+1],points[0]);
angle_2 = Angle(points[i+1],points[0],points[1]);
}
else if (i==points.size()-3) {
angle_1 = Angle(points[i],points[i+1],points[i+2]);
angle_2 = Angle(points[i+1],points[i+2],points[0]);
}
else {
angle_1 = Angle(points[i],points[i+1],points[i+2]);
angle_2 = Angle(points[i+1],points[i+2],points[i+3]);
}
if (EqualAngles(angle_1,angle_2)) {
if (RightAngle(angle_1) and RightAngle(angle_2) and HasAllEqualAngles()) return true;
if (AcuteAngle(angle_1) and AcuteAngle(angle_2)) return true;
}
}
return false;
}
bool Polygon::HasARightAngle() const {
double angle;
for (unsigned int i=0;i<points.size();i++) {
if (i==points.size()-1) {
angle = Angle(points[i], points[0], points[1]);
}
else if (i==points.size()-2) {
angle = Angle(points[i], points[i+1], points[0]);
}
else {
angle = Angle(points[i], points[i+1], points[i+2]);
}
if (RightAngle(angle)) return true; //foound a right angle
}
return false;
}
void Render(double time)
{
gl.Clear().ColorBuffer().StencilBuffer();
int border = 20;
std::stringstream text;
// shape colors
GLfloat shape_color_gen_coeffs[9] = {
0.0f, 0.0f, 0.2f,
0.2f, 0.0f, 0.2f,
0.0f, 0.0f, 0.2f
};
npr.ColorGen(
PathNVColor::Primary,
PathNVGenMode::ObjectBoundingBox,
PathNVColorFormat::RGB,
shape_color_gen_coeffs
);
// Shape
dsa.ModelviewMatrix()
.LoadIdentity()
.Translate(64, 64, 0)
.Translate(192, 192, 0)
.Rotate(RightAngles(time), Vec3f::Unit(2))
.Translate(-192, -192, 0);
shape.StencilFill(PathNVFillMode::CountUp, 0xFF);
shape.CoverFill(PathNVFillCoverMode::BoundingBox);
// text colors
GLfloat text_color_gen_coeffs[9] = {
-0.3f, 0.0f, 0.3f,
0.0f, 0.2f, 0.6f,
0.3f, 0.0f, 0.0f
};
npr.ColorGen(
PathNVColor::Primary,
PathNVGenMode::ObjectBoundingBox,
PathNVColorFormat::RGB,
text_color_gen_coeffs
);
// Time
dsa.ModelviewMatrix()
.LoadIdentity()
.Translate(border, border, 0);
text << "Time: "
<< std::setw(7)
<< std::setprecision(2)
<< std::fixed
<< time << "[s]";
RenderText(text.str());
text.str(std::string());
// Frame no
dsa.ModelviewMatrix()
.LoadIdentity()
.Translate(tex_side-border, border, 0)
.Rotate(RightAngle(), Vec3f::Unit(2));
text << "Frame: "
<< std::setw(7)
<< std::fixed
<< frame_no;
RenderText(text.str());
text.str(std::string());
// FPS
dsa.ModelviewMatrix()
.LoadIdentity()
.Translate(tex_side-border, tex_side-border, 0)
.Rotate(RightAngles(2), Vec3f::Unit(2));
text << "FPS: ";
if(time < 1) text << "<N/A>";
else text << std::setw(7) << std::fixed << frame_no / time;
RenderText(text.str());
text.str(std::string());
// title
dsa.ModelviewMatrix()
.LoadIdentity()
.Translate(border, tex_side-border, 0)
.Rotate(RightAngles(3), Vec3f::Unit(2));
RenderText("OpenGL");
// sync
thread_ready.Signal();
parent_ready.Wait();
++frame_no;
}
Mat4f RayMatrix(const AppData& app_data, unsigned face)
{
Vec3f cx, cy, cz;
switch(face)
{
case 0: // +X
{
cx = +Vec3f::Unit(2);
cy = +Vec3f::Unit(1);
cz = -Vec3f::Unit(0);
break;
}
case 1: // -X
{
cx = -Vec3f::Unit(2);
cy = +Vec3f::Unit(1);
cz = +Vec3f::Unit(0);
break;
}
case 2: // +Y
{
cx = -Vec3f::Unit(0);
cy = +Vec3f::Unit(2);
cz = +Vec3f::Unit(1);
break;
}
case 3: // -Y
{
cx = -Vec3f::Unit(0);
cy = -Vec3f::Unit(2);
cz = -Vec3f::Unit(1);
break;
}
case 4: // +Z
{
cx = -Vec3f::Unit(0);
cy = +Vec3f::Unit(1);
cz = -Vec3f::Unit(2);
break;
}
case 5: // -Z
{
cx = +Vec3f::Unit(0);
cy = +Vec3f::Unit(1);
cz = +Vec3f::Unit(2);
break;
}
default: OGLPLUS_ABORT("Invalid cube face");
}
return
CamMatrixf::PerspectiveX(
RightAngle(), 1,
app_data.cam_near,
app_data.cam_far
)* Mat4f(
Vec4f(cx, 0),
Vec4f(cy, 0),
Vec4f(cz, 0),
Vec4f::Unit(3)
);
}