Rename a lib function (overlaps with an old map entity field)

[xonotic/xonotic-data.pk3dir.git] / qcsrc / lib / vector.qh

diff --git a/qcsrc/lib/vector.qh b/qcsrc/lib/vector.qh
index 6cbaebdcdb124aa7e18626b084902c8834394749..0a887cfebb03c4544df88a8d0316bd6f8aa4ab8d 100644 (file)
--- a/qcsrc/lib/vector.qh
+++ b/qcsrc/lib/vector.qh
@@ -1,5 +1,45 @@
-#ifndef VECTOR_H
-#define VECTOR_H
+#pragma once
+
+noref vector _vlen2;
+#define vlen2(v) (_vlen2 = (v), dotproduct(_vlen2, _vlen2))
+
+#if 1
+noref float _vdist_f;
+/** Vector distance comparison, avoids sqrt() */
+#define vdist(v, cmp, f) (vlen2(v) cmp (_vdist_f = (f), _vdist_f * _vdist_f))
+#else
+#define vdist(v, cmp, f) (vlen(v) cmp (f))
+#endif
+
+#if 1
+#define dotproduct(a, b) ((a) * (b))
+#else
+noref vector _dotproduct_a, _dotproduct_b;
+#define dotproduct(a, b) \
+       (_dotproduct_a = (a), _dotproduct_b = (b), \
+         _dotproduct_a.x * _dotproduct_b.x \
+       + _dotproduct_a.y * _dotproduct_b.y \
+       + _dotproduct_a.z * _dotproduct_b.z)
+#endif
+
+#if 1
+#define cross(a, b) ((a) >< (b))
+#else
+vector cross(vector a, vector b)
+{
+       return
+               '1 0 0' * (a.y * b.z - a.z * b.y)
+       +       '0 1 0' * (a.z * b.x - a.x * b.z)
+       +       '0 0 1' * (a.x * b.y - a.y * b.x);
+}
+#endif
+
+noref vector _vmul_a, _vmul_b;
+#define vmul(a, b) \
+    (_vmul_a = (a), _vmul_b = (b), \
+         '1 0 0' * (_vmul_a.x * _vmul_b.x) \
+       + '0 1 0' * (_vmul_a.y * _vmul_b.y) \
+       + '0 0 1' * (_vmul_a.z * _vmul_b.z))
 
 const vector eX = '1 0 0';
 const vector eY = '0 1 0';
@@ -15,11 +55,6 @@ vector randompos(vector m1, vector m2)
        return v;
 }
 
-float vlen2d(vector v)
-{
-       return sqrt(v.x * v.x + v.y * v.y);
-}
-
 float vlen_maxnorm2d(vector v)
 {
        return max(v.x, v.y, -v.x, -v.y);
@@ -47,23 +82,26 @@ float boxesoverlap(vector m1, vector m2, vector m3, vector m4) { return m2_x >=
 /** requires the same as boxesoverlap, but is a stronger condition */
 float boxinsidebox(vector smins, vector smaxs, vector bmins, vector bmaxs) { return smins.x >= bmins.x && smaxs.x <= bmaxs.x && smins.y >= bmins.y && smaxs.y <= bmaxs.y && smins.z >= bmins.z && smaxs.z <= bmaxs.z; }
 
+#define PITCH(v) ((v).x)
+#define YAW(v) ((v).y)
+#define ROLL(v) ((v).z)
 
-vector vec2(vector v)
-{
-       v.z = 0;
-       return v;
-}
+#define MAKEVECTORS(f, angles, forward, right, up) MACRO_BEGIN { \
+       f(angles); \
+       forward = v_forward; \
+       right = v_right; \
+       up = v_up; \
+} MACRO_END
 
-vector vec3(float x, float y, float z)
-{
-       vector v;
-       v.x = x;
-       v.y = y;
-       v.z = z;
-       return v;
-}
+noref vector _vec2;
+#define vec2(...) EVAL(OVERLOAD(vec2, __VA_ARGS__))
+#define vec2_1(v) (_vec2 = (v), _vec2.z = 0, _vec2)
+#define vec2_2(x, y) (_vec2_x = (x), _vec2_y = (y), _vec2)
 
-vector rotate(vector v, float a)
+noref vector _vec3;
+#define vec3(_x, _y, _z) (_vec3.x = (_x), _vec3.y = (_y), _vec3.z = (_z), _vec3)
+
+vector Rotate(vector v, float a)
 {
        float a_sin = sin(a), a_cos = cos(a);
        vector r = '0 0 0';
@@ -72,13 +110,39 @@ vector rotate(vector v, float a)
        return r;
 }
 
-vector yinvert(vector v)
+noref vector _yinvert;
+#define yinvert(v) (_yinvert = (v), _yinvert.y = 1 - _yinvert.y, _yinvert)
+
+/**
+ * @param dir the directional vector
+ * @param norm the normalized normal
+ * @returns dir reflected by norm
+ */
+vector reflect(vector dir, vector norm)
 {
-       v.y = 1 - v.y;
-       return v;
+       return dir - 2 * (dir * norm) * norm;
+}
+
+/**
+ * clip vel along the plane defined by norm (assuming 0 distance away), bounciness determined by bounce 0..1
+ */
+vector vec_reflect(vector vel, vector norm, float bounce)
+{
+       return vel - (1 + bounce) * (vel * norm) * norm;
+}
+
+vector vec_epsilon(vector this, float eps)
+{
+       if (this.x > -eps && this.x < eps) this.x = 0;
+       if (this.y > -eps && this.y < eps) this.y = 0;
+       if (this.z > -eps && this.z < eps) this.z = 0;
+       return this;
 }
 
-#ifndef MENUQC
+#define ClipVelocity(in, normal, out, overbounce) \
+       (out = vec_epsilon(vec_reflect(in, normal, (overbounce) - 1), 0.1))
+
+#ifdef GAMEQC
        vector get_corner_position(entity box, int corner)
        {
                switch (corner)
@@ -107,5 +171,3 @@ vector yinvert(vector v)
                return ret;
        }
 #endif
-
-#endif