From 87915532ee904ecbb1547369f6be259896193368 Mon Sep 17 00:00:00 2001
From: luc <luc@gluc.ch>
Date: Fri, 3 Apr 2020 01:59:56 +0200
Subject: [PATCH] add integer vector

---
 sweet_math.c  | 117 +++++++++++++++++++++++++++++++++++++++++++++++---
 sweet_math.h  |  18 ++++++++
 sweet_types.h |  17 ++++++++
 3 files changed, 146 insertions(+), 6 deletions(-)

diff --git a/sweet_math.c b/sweet_math.c
index ab8ce62..446b390 100755
--- a/sweet_math.c
+++ b/sweet_math.c
@@ -24,6 +24,16 @@
 #include "sweet_types.h"
 
 
+void
+random_float_numbers(float * array, int n)
+{
+    int i;
+    for (i = 0; i < n; i++)
+    {
+        array[i] = (float)rand() / (float)RAND_MAX;
+    }
+}
+
 vec2
 vec2_zero ()
 {
@@ -82,7 +92,8 @@ vec4_new_4f (float a, float b, float c, float d)
     return v;
 }
 
-vec2 vec2_new_v3(vec3 w)
+vec2
+vec2_new_v3(vec3 w)
 {
     vec2 v;
     v.x = w.x;
@@ -90,7 +101,8 @@ vec2 vec2_new_v3(vec3 w)
     return v;
 }
 
-vec3 vec3_new_v2_1f(vec2 w, float z)
+vec3
+vec3_new_v2_1f(vec2 w, float z)
 {
     vec3 v;
     v.x = w.x;
@@ -99,7 +111,8 @@ vec3 vec3_new_v2_1f(vec2 w, float z)
     return v;
 }
 
-vec3 vec3_new_v4(vec4 w)
+vec3
+vec3_new_v4(vec4 w)
 {
     vec3 v;
     v.x = w.x;
@@ -108,7 +121,8 @@ vec3 vec3_new_v4(vec4 w)
     return v;
 }
 
-vec4 vec4_new_v2_2f(vec2 u, float z, float w)
+vec4
+vec4_new_v2_2f(vec2 u, float z, float w)
 {
     vec4 v;
     v.x = u.x;
@@ -118,7 +132,8 @@ vec4 vec4_new_v2_2f(vec2 u, float z, float w)
     return v;
 }
 
-vec4 vec4_new_v3_1f(vec3 u, float w)
+vec4
+vec4_new_v3_1f(vec3 u, float w)
 {
     vec4 v;
     v.x = u.x;
@@ -128,7 +143,8 @@ vec4 vec4_new_v3_1f(vec3 u, float w)
     return v;
 }
 
-vec4 vec4_new_v4 (vec4 v)
+vec4
+vec4_new_v4 (vec4 v)
 {
     return v;
 }
@@ -328,6 +344,95 @@ vec4_normalize (vec4 v)
     return nv;
 }
 
+vec2i
+vec2_int (vec2 v)
+{
+    vec2i u;
+    u.x = (int)(v.x > 0.0 ? v.x : v.x - 1);
+    u.y = (int)(v.y > 0.0 ? v.y : v.y - 1);
+    return u;
+}
+
+vec3i
+vec3_int (vec3 v)
+{
+    vec3i u;
+    u.x = (int)(v.x > 0.0 ? v.x : v.x - 1);
+    u.y = (int)(v.y > 0.0 ? v.y : v.y - 1);
+    u.z = (int)(v.z > 0.0 ? v.z : v.z - 1);
+    return u;
+}
+
+vec4i
+vec4_int (vec4 v)
+{ 
+    vec4i u;
+    u.x = (int)(v.x > 0.0 ? v.x : v.x - 1);
+    u.y = (int)(v.y > 0.0 ? v.y : v.y - 1);
+    u.z = (int)(v.z > 0.0 ? v.z : v.z - 1);
+    u.w = (int)(v.w > 0.0 ? v.w : v.w - 1);
+    return u;
+}
+
+vec2i
+vec2i_new (int x, int y)
+{
+    vec2i v;
+    v.x = x;
+    v.y = y;
+    return v;
+}
+
+vec3i
+vec3i_new (int x, int y, int z)
+{
+    vec3i v;
+    v.x = x;
+    v.y = y;
+    v.z = z;
+    return v;
+}
+
+vec4i
+vec4i_new (int x, int y, int z, int w)
+{
+    vec4i v;
+    v.x = x;
+    v.y = y;
+    v.z = z;
+    v.w = w;
+    return v;
+}
+
+vec2i
+vec2i_add (vec2i v1, vec2i v2)
+{
+    v1.x += v2.x;
+    v1.y += v2.y;
+
+    return v1;
+}
+
+vec3i
+vec3i_add (vec3i v1, vec3i v2)
+{
+    v1.x += v2.x;
+    v1.y += v2.y;
+    v1.z += v2.z;
+
+    return v1;
+}
+
+vec4i
+vec4i_add (vec4i v1, vec4i v2)
+{
+    v1.x += v2.x;
+    v1.y += v2.y;
+    v1.z += v2.z;
+    v1.w += v2.w;
+
+    return v1;
+}
 
 vec2
 vec2_scale (vec2 v, float s)
diff --git a/sweet_math.h b/sweet_math.h
index 59081ec..89a6a24 100755
--- a/sweet_math.h
+++ b/sweet_math.h
@@ -58,6 +58,9 @@
 #define max(a, b) (a >= b ? a : b)
 #define min(a, b) (a <= b ? a : b)
 
+/*  */
+void random_float_numbers(float * array, int n);
+
 /* Vector */
 
 vec2 vec2_zero();
@@ -205,6 +208,21 @@ vec2 vec2_product (vec2 vector1, vec2 vector2);
 vec3 vec3_product (vec3 vector1, vec3 vector2);
 vec4 vec4_product (vec4 vector1, vec4 vector2);
 
+/* Integer part */
+vec2i vec2_int (vec2 v);
+vec3i vec3_int (vec3 v);
+vec4i vec4_int (vec4 v);
+
+/* Integer vector builder */
+vec2i vec2i_new (int x, int y);
+vec3i vec3i_new (int x, int y, int z);
+vec4i vec4i_new (int x, int y, int z, int w);
+
+/* Integer vector addition */
+vec2i vec2i_add (vec2i vector1, vec2i vector2);
+vec3i vec3i_add (vec3i vector1, vec3i vector2);
+vec4i vec4i_add (vec4i vector1, vec4i vector2);
+
 /* Quaternion */
 quat quat_new (float w, float x, float y, float z);
 quat quat_rotation (float angle, float x, float y, float z);
diff --git a/sweet_types.h b/sweet_types.h
index 3ac0423..d9eba91 100755
--- a/sweet_types.h
+++ b/sweet_types.h
@@ -50,6 +50,23 @@ typedef struct vec2 {
     float y;
 } vec2;
 
+typedef struct vec4i {
+    int x;
+    int y;
+    int z;
+    int w;
+} vec4i;
+
+typedef struct vec3i {
+    int x;
+    int y;
+    int z;
+} vec3i;
+
+typedef struct vec2i {
+    int x;
+    int y;
+} vec2i;
 
 typedef struct complex {
     float r;