From 0eb2789a2d66256b3d1503d5c0fc5e0236b837bb Mon Sep 17 00:00:00 2001
From: bjorn <tie.372@gmail.com>
Date: Wed, 30 Jan 2019 16:13:44 -0800
Subject: [PATCH] Improve mat4:set;

Ended up removing the diagonal variant, sorry holo.
---
 src/api/graphics.c    |  18 +-
 src/api/math.h        |   2 +-
 src/api/math.lua      |  62 ++++-
 src/api/math.lua.h    | 622 +++++++++++++++++++++++-------------------
 src/api/types/mat4.c  |  16 +-
 src/api/types/mesh.c  |   2 +-
 src/api/types/model.c |   2 +-
 7 files changed, 415 insertions(+), 309 deletions(-)

diff --git a/src/api/graphics.c b/src/api/graphics.c
index 71dcb8c2..7f1cb87a 100644
--- a/src/api/graphics.c
+++ b/src/api/graphics.c
@@ -643,14 +643,14 @@ static int l_lovrGraphicsScale(lua_State* L) {
 
 static int l_lovrGraphicsTransform(lua_State* L) {
   float transform[16];
-  luax_readmat4(L, 1, transform, 3, NULL);
+  luax_readmat4(L, 1, transform, 3);
   lovrGraphicsMatrixTransform(transform);
   return 0;
 }
 
 static int l_lovrGraphicsSetProjection(lua_State* L) {
   float transform[16];
-  luax_readmat4(L, 1, transform, 3, NULL);
+  luax_readmat4(L, 1, transform, 3);
   lovrGraphicsSetProjection(transform);
   return 0;
 }
@@ -755,7 +755,7 @@ static int l_lovrGraphicsPlane(lua_State* L) {
     style = luaL_checkoption(L, 1, NULL, DrawStyles);
   }
   float transform[16];
-  luax_readmat4(L, 2, transform, 2, NULL);
+  luax_readmat4(L, 2, transform, 2);
   lovrGraphicsPlane(style, material, transform);
   return 0;
 }
@@ -769,7 +769,7 @@ static int luax_rectangularprism(lua_State* L, int scaleComponents) {
     style = luaL_checkoption(L, 1, NULL, DrawStyles);
   }
   float transform[16];
-  luax_readmat4(L, 2, transform, scaleComponents, NULL);
+  luax_readmat4(L, 2, transform, scaleComponents);
   lovrGraphicsBox(style, material, transform);
   return 0;
 }
@@ -796,7 +796,7 @@ static int l_lovrGraphicsArc(lua_State* L) {
     mode = luaL_checkoption(L, index++, NULL, ArcModes);
   }
   float transform[16];
-  index = luax_readmat4(L, index, transform, 1, NULL);
+  index = luax_readmat4(L, index, transform, 1);
   float r1 = luax_optfloat(L, index++, 0.f);
   float r2 = luax_optfloat(L, index++, 2.f * M_PI);
   int segments = luaL_optinteger(L, index, 64) * (MIN(fabsf(r2 - r1), 2 * M_PI) / (2 * M_PI));
@@ -813,7 +813,7 @@ static int l_lovrGraphicsCircle(lua_State* L) {
     style = luaL_checkoption(L, 1, NULL, DrawStyles);
   }
   float transform[16];
-  int index = luax_readmat4(L, 2, transform, 1, NULL);
+  int index = luax_readmat4(L, 2, transform, 1);
   int segments = luaL_optinteger(L, index, 32);
   lovrGraphicsCircle(style, material, transform, segments);
   return 0;
@@ -823,7 +823,7 @@ static int l_lovrGraphicsCylinder(lua_State* L) {
   float transform[16];
   int index = 1;
   Material* material = lua_isuserdata(L, index) ? luax_checktype(L, index++, Material) : NULL;
-  index = luax_readmat4(L, index, transform, 1, NULL);
+  index = luax_readmat4(L, index, transform, 1);
   float r1 = luax_optfloat(L, index++, 1.f);
   float r2 = luax_optfloat(L, index++, 1.f);
   bool capped = lua_isnoneornil(L, index) ? true : lua_toboolean(L, index++);
@@ -836,7 +836,7 @@ static int l_lovrGraphicsSphere(lua_State* L) {
   float transform[16];
   int index = 1;
   Material* material = lua_isuserdata(L, index) ? luax_checktype(L, index++, Material) : NULL;
-  index = luax_readmat4(L, index, transform, 1, NULL);
+  index = luax_readmat4(L, index, transform, 1);
   int segments = luaL_optinteger(L, index, 30);
   lovrGraphicsSphere(material, transform, segments);
   return 0;
@@ -856,7 +856,7 @@ static int l_lovrGraphicsPrint(lua_State* L) {
   size_t length;
   const char* str = luaL_checklstring(L, 1, &length);
   float transform[16];
-  int index = luax_readmat4(L, 2, transform, 1, NULL);
+  int index = luax_readmat4(L, 2, transform, 1);
   float wrap = luax_optfloat(L, index++, 0.f);
   HorizontalAlign halign = luaL_checkoption(L, index++, "center", HorizontalAligns);
   VerticalAlign valign = luaL_checkoption(L, index++, "middle", VerticalAligns);
diff --git a/src/api/math.h b/src/api/math.h
index 28cbba97..2b3f5065 100644
--- a/src/api/math.h
+++ b/src/api/math.h
@@ -8,7 +8,7 @@ float* luax_checkmathtype(lua_State* L, int index, MathType type, const char* ex
 int luax_readvec3(lua_State* L, int index, vec3 v, const char* expected);
 int luax_readscale(lua_State* L, int index, vec3 v, int components, const char* expected);
 int luax_readquat(lua_State* L, int index, quat q, const char* expected);
-int luax_readmat4(lua_State* L, int index, mat4 m, int scaleComponents, const char* expected);
+int luax_readmat4(lua_State* L, int index, mat4 m, int scaleComponents);
 Seed luax_checkrandomseed(lua_State* L, int index);
 int l_lovrRandomGeneratorRandom(lua_State* L);
 int l_lovrRandomGeneratorRandomNormal(lua_State* L);
diff --git a/src/api/math.lua b/src/api/math.lua
index f07200d2..27fc84f9 100644
--- a/src/api/math.lua
+++ b/src/api/math.lua
@@ -349,19 +349,57 @@ ffi.metatype(mat4, {
         m.m[12], m.m[13], m.m[14], m.m[15]
     end,
 
-    set = function(m, x, ...)
-      checkmat4(m)
-      if not x then
-        m:identity()
-      elseif not ... and type(x) == 'number' then
-        m.m[0], m.m[5], m.m[10], m.m[15] = x, x, x, x
-      elseif ... then
-        m.m[0], m.m[1], m.m[2], m.m[3],
-        m.m[4], m.m[5], m.m[6], m.m[7],
-        m.m[8], m.m[9], m.m[10], m.m[11],
-        m.m[12], m.m[13], m.m[14], m.m[15] = x, ...
+    set = function(M, ...)
+      checkmat4(M)
+
+      if ... == nil then
+        return C.mat4_identity(M)
       end
-      return m
+
+      if select('#', ...) >= 16 then
+        M.m[0] , M.m[1] , M.m[2] ,  M.m[3],
+        M.m[4] , M.m[5] , M.m[6] ,  M.m[7],
+        M.m[8] , M.m[9] , M.m[10], M.m[11],
+        M.m[12], M.m[13], M.m[14], M.m[15] = ...
+        return M
+      end
+
+      if istype(mat4, ...) then
+        return C.mat4_set(M, ...)
+      end
+
+      local i = 1
+      C.mat4_identity(M)
+
+      -- Position
+      local x, y, z = ...
+      if istype(vec3, x) then
+        M.m[12], M.m[13], M.m[14] = x.x, x.y, x.z
+        i = i + 1
+      else
+        assert(type(x) == 'number' and type(y) == 'number' and type(z) == 'number', 'Expected position as 3 numbers or a vec3')
+        M.m[12], M.m[13], M.m[14] = x, y, z
+        i = i + 3
+      end
+
+      -- Scale
+      local sx, sy, sz = select(i, ...)
+      if istype(vec3, sx) then
+        sx, sy, sz = sx.x, sx.y, sx.z
+        i = i + 1
+      else
+        i = i + 3
+      end
+
+      -- Rotate
+      local angle, ax, ay, az = select(i, ...)
+      if istype(quat, angle) then
+        C.mat4_rotateQuat(M, angle)
+      else
+        C.mat4_rotate(M, angle, ax, ay, az)
+      end
+
+      return C.mat4_scale(M, sx, sy, sz)
     end,
 
     save = function(m)
diff --git a/src/api/math.lua.h b/src/api/math.lua.h
index 2224e92c..8320d927 100644
--- a/src/api/math.lua.h
+++ b/src/api/math.lua.h
@@ -768,292 +768,362 @@ unsigned char math_lua[] = {
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+  0x20, 0x72, 0x65, 0x74, 0x75, 0x72, 0x6e, 0x20, 0x27, 0x6d, 0x61, 0x74,
+  0x34, 0x27, 0x0a, 0x20, 0x20, 0x65, 0x6e, 0x64, 0x0a, 0x7d, 0x29, 0x0a
 };
-unsigned int math_lua_len = 12667;
+unsigned int math_lua_len = 13512;
diff --git a/src/api/types/mat4.c b/src/api/types/mat4.c
index 63506360..3a602901 100644
--- a/src/api/types/mat4.c
+++ b/src/api/types/mat4.c
@@ -3,7 +3,7 @@
 #include "math/math.h"
 #include "lib/math.h"
 
-int luax_readmat4(lua_State* L, int index, mat4 m, int scaleComponents, const char* expected) {
+int luax_readmat4(lua_State* L, int index, mat4 m, int scaleComponents) {
   switch (lua_type(L, index)) {
     case LUA_TNIL:
     case LUA_TNONE:
@@ -45,14 +45,12 @@ static int l_lovrMat4Unpack(lua_State* L) {
 
 int l_lovrMat4Set(lua_State* L) {
   mat4 m = luax_checkmathtype(L, 1, MATH_MAT4, NULL);
-  switch (lua_gettop(L)) {
-    case 1: mat4_identity(m); break;
-    case 2: m[0] = m[5] = m[10] = m[15] = luax_checkfloat(L, 2); break;
-    default:
-      for (int i = 0; i < 16; i++) {
-        m[i] = luax_checkfloat(L, i + 2);
-      }
-      break;
+  if (lua_gettop(L) >= 17) {
+    for (int i = 2; i <= 17; i++) {
+      *m++ = luaL_checknumber(L, i);
+    }
+  } else {
+    luax_readmat4(L, 2, m, 3);
   }
   lua_settop(L, 1);
   return 1;
diff --git a/src/api/types/mesh.c b/src/api/types/mesh.c
index b2972a49..d42f5cfe 100644
--- a/src/api/types/mesh.c
+++ b/src/api/types/mesh.c
@@ -74,7 +74,7 @@ int l_lovrMeshDetachAttributes(lua_State* L) {
 int l_lovrMeshDraw(lua_State* L) {
   Mesh* mesh = luax_checktype(L, 1, Mesh);
   float transform[16];
-  int index = luax_readmat4(L, 2, transform, 1, NULL);
+  int index = luax_readmat4(L, 2, transform, 1);
   int instances = luaL_optinteger(L, index, 1);
   uint32_t vertexCount = lovrMeshGetVertexCount(mesh);
   uint32_t indexCount = lovrMeshGetIndexCount(mesh);
diff --git a/src/api/types/model.c b/src/api/types/model.c
index 775a4591..fcec6342 100644
--- a/src/api/types/model.c
+++ b/src/api/types/model.c
@@ -5,7 +5,7 @@
 int l_lovrModelDraw(lua_State* L) {
   Model* model = luax_checktype(L, 1, Model);
   float transform[16];
-  int index = luax_readmat4(L, 2, transform, 1, NULL);
+  int index = luax_readmat4(L, 2, transform, 1);
   int instances = luaL_optinteger(L, index, 1);
   lovrModelDraw(model, transform, instances);
   return 0;