start on ga header

This commit is contained in:
2019-01-13 21:34:36 -05:00
parent 84acea1d8f
commit e5092e9c6b
2 changed files with 135 additions and 9 deletions

121
main/include/glga.hpp Normal file
View File

@@ -0,0 +1,121 @@
#include <math.h>
namespace ga {
struct Vec;
struct Bivec;
struct Mat;
struct Vec {
float x, y, z, w;
Vec(float x, float y, float z, float w) :
x(x), y(y), z(z), w(w) {}
};
struct Bivec {
float xy, yz, zw, wx, xz, yw;
Bivec(float xy, float yz, float zw, float wx, float xz, float yw) :
xy(xy), yz(yz), zw(zw), wx(wx), xz(xz), yw(yw) {}
};
struct Mat {
Vec x, y, z, w;
Mat(Vec x, Vec y, Vec z, Vec w) : x(x), y(y), z(z), w(w) {}
};
namespace unit {
Vec x() { return Vec(1, 0, 0, 0); };
Vec y() { return Vec(1, 0, 0, 0); };
Vec z() { return Vec(1, 0, 0, 0); };
Vec w() { return Vec(1, 0, 0, 0); };
Bivec xy() { return Bivec(1, 0, 0, 0, 0, 0); }
Bivec yz() { return Bivec(0, 1, 0, 0, 0, 0); }
Bivec zw() { return Bivec(0, 0, 1, 0, 0, 0); }
Bivec wx() { return Bivec(0, 0, 0, 1, 0, 0); }
Bivec xz() { return Bivec(0, 0, 0, 0, 1, 0); }
Bivec yw() { return Bivec(0, 0, 0, 0, 0, 1); }
}
float length2(Vec v) {
return v.x * v.x + v.y * v.y + v.z * v.z + v.w * v.w;
}
float length2(Bivec v) {
return v.xy * v.xy + v.yz * v.yz + v.zw * v.zw
+ v.wx * v.wx + v.xz * v.xz + v.yw * v.yw;
}
float length(Vec v) { return sqrt(length2(v)); }
float length(Bivec v) { return sqrt(length2(v)); }
Vec add(Vec u, Vec v) {
return Vec(u.x + v.x,
u.y + v.y,
u.z + v.z,
u.w + v.w);
}
Bivec add(Bivec u, Bivec v) {
Bivec(u.xy + v.xy,
u.yz + v.yz,
u.zw + v.zw,
u.wx + v.wx,
u.xz + v.xz,
u.yw + v.yw);
}
Vec mul(float c, Vec v) {
return Vec(c * v.x,
c * v.y,
c * v.z,
c * v.w);
}
Bivec mul(float c, Bivec v) {
Bivec(c * v.xy,
c * v.yz,
c * v.zw,
c * v.wx,
c * v.xz,
c * v.yw);
}
Vec normalize(Vec v) {
return mul(1 / length(v), v);
}
Bivec normalize(Bivec v) {
return mul(1 / length(v), v);
}
Mat matrix(float c) {
// c as a transformation
// scale by c
return Mat(Vec(c, 0, 0, 0), Vec(0, c, 0, 0), Vec(0, 0, c, 0), Vec(0, 0, 0, c));
}
Mat matrix(Vec v) {
// v as a transformation
// reflect along v
return matrix(1); // todo reflection
}
Mat rotor(Bivec v) {
// v as a transformation
// rotate along v
return matrix(1);
}
}

View File

@@ -7,6 +7,8 @@
#include <vector>
#include <cmath>
#include "glga.hpp"
#define PI 3.14159f
namespace util {
@@ -200,16 +202,19 @@ struct State {
float s_ = std::sin(3.f / 8);
glBindBuffer(GL_UNIFORM_BUFFER, ubo);
util::bufferData<float>(GL_UNIFORM_BUFFER, {
1.f / 4 / ar, 0, 0, 0,
0, 0, 1.f / 10, 0,
0, 1.f / 4, 0, 0,
0, 0, 0, 1,
util::bufferData<ga::Mat>(GL_UNIFORM_BUFFER, {
ga::Mat(
ga::Vec(1.f / 4 / ar, 0, 0, 0),
ga::Vec(0, 0, 1.f / 10, 0),
ga::Vec(0, 1.f / 4, 0, 0),
ga::Vec(0, 0, 0, 1.f)),
c, 0, 0, s,
0, c_, s_, 0,
0, -s_, c_, 0,
-s, 0, 0, c
ga::Mat(
ga::Vec(c, 0, 0, s),
ga::Vec(0, c_, s_, 0),
ga::Vec(0, -s_, c_, 0),
ga::Vec(-s, 0, 0, c)
)
}, GL_STREAM_DRAW);
glBindBuffer(GL_UNIFORM_BUFFER, 0);
}