From 397ec3ee681eb1055644a04e9fa6a9962972f69c Mon Sep 17 00:00:00 2001
From: cinnaboot <cinnaboot@protonmail.com>
Date: Sat, 19 Dec 2020 14:02:57 -0500
Subject: [PATCH] enable world_transform in default shader path

---
 include/shader_program.h | 1 +
 src/default_shaders.cpp  | 4 +++-
 src/entity.cpp           | 2 --
 src/render_object.cpp    | 6 +++++-
 src/shader_program.cpp   | 2 ++
 5 files changed, 11 insertions(+), 4 deletions(-)

diff --git a/include/shader_program.h b/include/shader_program.h
index 2376f69..a5c2819 100644
--- a/include/shader_program.h
+++ b/include/shader_program.h
@@ -11,6 +11,7 @@ struct default_shader_program
 	GLuint program_id;
 
 	GLuint model_matrix_id;
+	GLuint world_transform_id;
 	GLuint view_matrix_id;
 	GLuint projection_matrix_id;
 	GLuint normal_matrix_id;
diff --git a/src/default_shaders.cpp b/src/default_shaders.cpp
index 206718c..8d89a8a 100644
--- a/src/default_shaders.cpp
+++ b/src/default_shaders.cpp
@@ -9,6 +9,7 @@ out vec3 fragVertex;
 out vec3 fragNormal;
 out vec2 fragUV;
 
+uniform mat4 world_transform;
 uniform mat4 model;
 uniform mat4 view;
 uniform mat4 projection;
@@ -19,7 +20,8 @@ void main()
 	fragNormal = normal;
 	fragVertex = vertexPosition_modelspace;
 	fragUV = texCoord.st;
-	gl_Position = projection * view * model * vec4(vertexPosition_modelspace, 1);
+	gl_Position = projection * view *
+		world_transform * model * vec4(vertexPosition_modelspace, 1);
 }
 )VS";
 
diff --git a/src/entity.cpp b/src/entity.cpp
index 4c9196f..b95bb85 100644
--- a/src/entity.cpp
+++ b/src/entity.cpp
@@ -35,8 +35,6 @@ entInitModel(entity& e, const char* model_path)
 bool
 entInitMesh(entity& e, simple_mesh* mesh, GLenum draw_mode)
 {
-	// TODO: test that this doesn't really do anything, then remove, and in
-	// 	entInitModel
 	initDefaults(e);
 	e.mesh = mesh;
 	e.render_objs = roInitSimpleMesh(*e.mesh, draw_mode);
diff --git a/src/render_object.cpp b/src/render_object.cpp
index 3597723..48a00e1 100644
--- a/src/render_object.cpp
+++ b/src/render_object.cpp
@@ -52,6 +52,7 @@ bool initGLTexture(const util_image image, GLuint& tex_id);
 bool loadMeshIntoGL(default_render_object* ro_out, mesh_info* mi_in);
 inline void updateMatrices(default_shader_program* shader,
 	camera& cam,
+	glm::mat4 world_xform,
 	glm::mat4 node_xform);
 
 
@@ -157,7 +158,7 @@ drawDefault(render_objects* r_objs,
 	default_shader_program* shader = sw.default_shader;
 	default_render_object* objects = (default_render_object*) r_objs->objects;
 	glUseProgram(shader->program_id);
-	updateMatrices(shader, cam, objects->node_xform);
+	updateMatrices(shader, cam, world_transform, objects->node_xform);
 	if (lights->needs_update) lightsUpdate(lights, shader);
 
 	for (uint i = 0; i < r_objs->count; i++) {
@@ -289,8 +290,11 @@ loadMeshIntoGL(default_render_object* ro_out, mesh_info* mi_in)
 inline void
 updateMatrices(default_shader_program* shader,
 	camera& cam,
+	glm::mat4 world_xform,
 	glm::mat4 node_xform)
 {
+	glUniformMatrix4fv(
+		shader->world_transform_id, 1, GL_FALSE, &world_xform[0][0]);
 	glUniformMatrix4fv(shader->model_matrix_id, 1, GL_FALSE, &node_xform[0][0]);
 	glUniformMatrix4fv(shader->view_matrix_id, 1, GL_FALSE, &cam.view[0][0]);
 	glUniformMatrix4fv(shader->projection_matrix_id, 1, GL_FALSE,
diff --git a/src/shader_program.cpp b/src/shader_program.cpp
index f9c5499..ce7f05c 100644
--- a/src/shader_program.cpp
+++ b/src/shader_program.cpp
@@ -28,6 +28,8 @@ shaderInitDefault(const char* vertex_code, const char* frag_code)
 	glBindVertexArray(sp->vertex_array_id);
 
 	// assign uniforms
+	sp->world_transform_id =
+		glGetUniformLocation(sp->program_id, "world_transform");
 	sp->model_matrix_id = glGetUniformLocation(sp->program_id, "model");
 	sp->view_matrix_id = glGetUniformLocation(sp->program_id, "view");
 	sp->projection_matrix_id =