working mesh rendering and shader uniforms

TODO.md

@@ -2,6 +2,7 @@
 
 * rename rect to rectangle
 * fields - maybe std::variant?
+* add more tests for linear algebra
 
 # scripting
 
@@ -14,7 +15,7 @@
 
 # system
 
-* filesystem walker with C++17
+* filesystem walker with C++17 (or inotify, FindFirstChangeNotification or FSEvents)
 
 # visual
 

src/core/CMakeLists.txt

@@ -1,6 +1,7 @@
 
 set(hdrs
     include/pw/core/axisangle.hpp
+	include/pw/core/color.hpp
     include/pw/core/core.hpp
     include/pw/core/debug.hpp
     include/pw/core/globals.hpp
@@ -10,7 +11,7 @@ set(hdrs
     include/pw/core/quaternion.hpp
     include/pw/core/image.hpp
     include/pw/core/point.hpp
-    include/pw/core/rect.hpp
+	include/pw/core/rectangle.hpp
     include/pw/core/serialize.hpp
     include/pw/core/size.hpp
     include/pw/core/timer.hpp

src/core/include/pw/core/color.hpp

@@ -0,0 +1,55 @@
+/*
+ * Copyright (c) 1999-2019 Hartmut Seichter
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ */
+#ifndef PW_CORE_COLOR_HPP
+#define PW_CORE_COLOR_HPP
+
+#include <pw/core/vector.hpp>
+#include <limits>
+
+namespace pw {
+
+struct color {
+	vector4 components;
+
+	color(uint8_t r8,uint8_t g8,uint8_t b8,uint8_t a8)
+		: color(static_cast<real_t>(r8 / std::numeric_limits<uint8_t>::max()),
+				static_cast<real_t>(g8 / std::numeric_limits<uint8_t>::max()),
+				static_cast<real_t>(b8 / std::numeric_limits<uint8_t>::max()),
+				static_cast<real_t>(a8 / std::numeric_limits<uint8_t>::max()))
+	{
+	}
+
+	color(real_t r,real_t g,real_t b,real_t a)
+		: components({r,g,b,a})
+	{
+	}
+
+	uint32_t to_rgb8888() const {
+		return 0;
+	}
+};
+
+}
+
+
+#endif

src/core/include/pw/core/quaternion.hpp

@@ -43,6 +43,7 @@ struct quaternion_ : vector4_<T> {
     using base_type::z;
     using base_type::w;
     using base_type::lerp;
+	using base_type::xyz;
 //    using base_type::operator*;
 //    using base_type::operator/;
 

src/core/include/pw/core/rectangle.hpp

@@ -29,14 +29,14 @@
 namespace pw {
 
 template <typename T_>
-struct rect_ {
+struct rectangle_ {
 
 	size_<T_> size;
 	point_<T_> position;
 
-	rect_() = default;
+	rectangle_() = default;
 
-	rect_(point_<T_> const & p,size_<T_> const & s) : size(s), position(p) {}
+	rectangle_(point_<T_> const & p,size_<T_> const & s) : size(s), position(p) {}
 
     bool contains(const point_<T_>& p) const
     {
@@ -45,16 +45,15 @@ struct rect_ {
     }
 
     template <typename To_>
-    rect_<To_> cast() const { return rect_<To_>(position.template cast<To_>(),size.template cast<To_>()); }
-
+	rectangle_<To_> cast() const { return rectangle_<To_>(position.template cast<To_>(),size.template cast<To_>()); }
 
 };
 
-typedef rect_<real_t> rect;
+typedef rectangle_<real_t> rectangle;
 
-typedef rect_<int> recti;
-typedef rect_<float> rectf;
-typedef rect_<float> rectd;
+typedef rectangle_<int> rectanglei;
+typedef rectangle_<float> rectanglef;
+typedef rectangle_<double> rectangled;
 
 }
 

src/core/tests/pwcore_test_vector.cpp

@@ -30,7 +30,7 @@ int main(int argc,char **argv) {
 
     auto v3_h = v.homogenous();
 
-//    auto v3_lerp = vector4f::lerp()
+//	auto v3_lerp = vector4f::
 
     std::cout << "v3 = " << pw::serialize::matrix(v3) << std::endl;
 

src/scene/CMakeLists.txt

@@ -3,7 +3,6 @@ set(hdrs
 	include/pw/scene/camera.hpp
 	include/pw/scene/component.hpp
 	include/pw/scene/node.hpp
-#	include/pw/scene/mesh.hpp
 	include/pw/scene/scene.hpp
 	include/pw/scene/transform.hpp
 	include/pw/scene/traverser.hpp
@@ -13,7 +12,6 @@ set(srcs
 	src/node.cpp
 	src/camera.cpp
 	src/component.cpp
-#	src/mesh.cpp
 	src/scene.cpp
 	src/transform.cpp
 	src/traverser.cpp

src/scene/src/component.cpp

@@ -47,6 +47,19 @@ void component::set_weight(const uint32_t &weight)
 }
 
 
+class material_component {
+
+	enum shading_input {
+		albedo,
+		specular
+	};
+
+//	std::map<shading_input,vector4> _colors;
+
+
+//	std::shared_ptr<image> _albedo;
+};
+
 
 //class trs : public transform {
 

src/scene/tests/pwscene_test_node.cpp

@@ -3,6 +3,8 @@
 #include <pw/scene/node.hpp>
 #include <pw/scene/transform.hpp>
 
+#include <pw/core/serialize.hpp>
+
 #include <iostream>
 
 void print_node_path(pw::node::ref node) {
@@ -49,7 +51,6 @@ int main(int argc,char **argv) {
 
 	print_node_path((n));
 
-
 //	auto t = n->transform();
 
 //	if (t)

src/scripting/src/script_core.cpp

@@ -30,6 +30,9 @@ void register_core_function(sol::state& lua,sol::table& ns)
 	ns.new_usertype<matrix4x4>("matrix4x4"
 							   , sol::constructors<matrix4x4()>()
 							   , "row",&matrix4x4::row
+							   , "column",&matrix4x4::column
+							   , "set_identity",&matrix4x4::set_identity
+							   , "inverse",&matrix4x4::inverse
 							   );
 
 	ns.new_usertype<vector3>("vector3"
@@ -60,15 +63,16 @@ void register_core_function(sol::state& lua,sol::table& ns)
 			("axisangle",
 			 sol::constructors<axisangle(), axisangle(vector3,Scalar)>(),
 			 "axis",&axisangle::axis,
-             "angle",&axisangle::angle
+			 "angle",&axisangle::angle,
+			 "from_matrix",&axisangle::from_matrix,
+			 "to_matrix",&axisangle::to_matrix
 			 );
 
 
-	ns.new_usertype<size>("size",
-						  sol::constructors<size(),size(Scalar,Scalar)>(),
-						  "width",&size::width,
-						  "height",&size::height
-						  //						   "none",sol::debug::level::none
+	ns.new_usertype<size>("size"
+						  , sol::constructors<size(),size(Scalar,Scalar)>()
+						  , "width",&size::width
+						  , "height",&size::height
 						  );
 
 	ns.new_usertype<point>("point",

src/system/include/pw/system/display.hpp

@@ -16,6 +16,7 @@ public:
 	std::string name() const { return _name; }
 
 protected:
+
 	friend class window;
 
 	std::string _name;

src/visual/CMakeLists.txt

@@ -12,10 +12,17 @@ set(srcs
 	src/pipeline.cpp
 	)
 
+
+set(srcs_shader
+	src/shader/unlit_vs.glsl
+	src/shader/unlit_fs.glsl
+	)
+
 add_library(pwvisual
 	STATIC
 	${hdrs}
 	${srcs}
+	${srcs_shader}
 	)
 
 target_include_directories(

src/visual/include/pw/visual/mesh_renderer.hpp

@@ -11,11 +11,23 @@ namespace pw {
 class mesh_renderer {
 public:
 
-	void render(const mesh& mesh,
-				const matrix4x4& model_matrix,
-				const matrix4x4& view_matrix,
-				const matrix4x4& projection_matrix
-				);
+
+	mesh_renderer();
+	~mesh_renderer();
+
+	bool ready() const;
+
+	void create(const mesh &m);
+	void destroy();
+
+	void draw();
+
+
+//	void render(const mesh& mesh,
+//				const matrix4x4& model_matrix,
+//				const matrix4x4& view_matrix,
+//				const matrix4x4& projection_matrix
+//				);
 
 protected:
 

src/visual/include/pw/visual/shader.hpp

@@ -3,6 +3,7 @@
 
 #include <pw/core/globals.hpp>
 #include <pw/core/matrix.hpp>
+#include <pw/core/vector.hpp>
 #include <pw/core/debug.hpp>
 
 #include <map>
@@ -31,18 +32,21 @@ public:
 
 	shader& bind(int location,float v);
 	shader& bind(int location,matrix4x4f const & v);
+	shader& bind(int location,vector4f const & v);
 
-	int uniform_location(std::string const & name);
+	int uniform_location(std::string const & name) const;
 
 	template<typename T> shader & bind(std::string const & name, T&& value)
 	{
 		int location = uniform_location(name);
-		if (location == -1) debug::e() << "missing uniform: "<< name;
-		else bind(location, std::forward<T>(value));
+		if (location >= 0)
+			return bind(location, std::forward<T>(value));
+		else
+			debug::e() << "missing uniform: "<< name;
 		return *this;
 	}
 
-    void build();
+	bool build();
 
     void use();
 

src/visual/src/mesh_renderer.cpp

@@ -15,11 +15,21 @@ struct mesh_renderer::impl {
 	GLuint _vao = 0;
 	std::vector<GLuint> _vbos;
 
-	impl(mesh_renderer& )
+	impl()
 	{
 	}
 
-	void create(std::shared_ptr<mesh> mesh)
+	~impl()
+	{
+		destroy();
+	}
+
+	bool ready() const
+	{
+		return GL_TRUE == glIsVertexArray(_vao);
+	}
+
+	void create(const mesh& m)
 	{
 		glGenVertexArrays(1,&_vao);
 		glBindVertexArray(_vao);
@@ -27,8 +37,8 @@ struct mesh_renderer::impl {
 		size_t arrays_needed = 0;
 
 		// should bail out here
-		if (!mesh->vertices().empty()) arrays_needed++;
-		if (!mesh->indices().empty()) arrays_needed++;
+		if (!m.vertices().empty()) arrays_needed++;
+		if (!m.indices().empty()) arrays_needed++;
 
 		// TODO: implement the other arrays
 
@@ -38,22 +48,22 @@ struct mesh_renderer::impl {
 
 		// vertices
 		glBindBuffer(GL_ARRAY_BUFFER, _vbos[0]);
-		glBufferData(GL_ARRAY_BUFFER, sizeof(mesh->vertices().front()) * mesh->vertices().size(), mesh->vertices().data(),
+		glBufferData(GL_ARRAY_BUFFER, sizeof(m.vertices().front()) * m.vertices().size(), m.vertices().data(),
 					 GL_STATIC_DRAW);
 		glEnableVertexAttribArray(0);
 		glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 0, nullptr);
 
 		// indices
 		glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, _vbos[1]);
-		glBufferData(GL_ELEMENT_ARRAY_BUFFER, sizeof(mesh->indices().front()) * mesh->indices().size(), mesh->indices().data(),
+		glBufferData(GL_ELEMENT_ARRAY_BUFFER, sizeof(m.indices().front()) * m.indices().size(), m.indices().data(),
 				GL_STATIC_DRAW);
 
-
 		// stop binding
 		glBindVertexArray(0);
 
 	}
 
+
 	void destroy()
 	{
 		glDeleteVertexArrays(1,&_vao);
@@ -65,12 +75,44 @@ struct mesh_renderer::impl {
 
     void draw()
     {
-
+		glBindVertexArray(_vao);
+		glDrawElements(GL_TRIANGLES, 3, GL_UNSIGNED_INT, nullptr);
     }
 
 };
 
+//
+//
+//
 
+mesh_renderer::mesh_renderer()
+	: _impl(std::make_unique<mesh_renderer::impl>())
+{
+}
+
+mesh_renderer::~mesh_renderer()
+{
+}
+
+bool mesh_renderer::ready() const
+{
+	return _impl->ready();
+}
+
+void mesh_renderer::create(const mesh &m)
+{
+	_impl->create(m);
+}
+
+void mesh_renderer::destroy()
+{
+	_impl->destroy();
+}
+
+void mesh_renderer::draw()
+{
+	_impl->draw();
+}
 
 
 }

src/visual/src/pipeline.cpp

@@ -7,6 +7,7 @@
 #include "pw/core/debug.hpp"
 #include "pw/visual/pipeline.hpp"
 #include "pw/visual/shader.hpp"
+#include "pw/visual/mesh_renderer.hpp"
 
 #include "glad/glad.h"
 
@@ -22,6 +23,7 @@ struct triangle_renderer
 
     shader shader_p;
     mesh amesh;
+	mesh_renderer amesh_renderer;
 
     triangle_renderer()
     {
@@ -48,6 +50,10 @@ struct triangle_renderer
         amesh.set_indices(indices);
         amesh.set_vertices(vertices);
 
+
+		amesh_renderer.create(amesh);
+
+
         size_t vertex_size_bytes = amesh.vertices().size() * sizeof(mesh::vertex3array_t::value_type);
         size_t vertex_stride = amesh.vertices().front().size();
 
@@ -79,17 +85,12 @@ struct triangle_renderer
                 }
                 )";
 
-//        "#version 400\n"
-//                "in vec3 vp;"
-//                "void main() {"
-//                "  gl_Position = vec4(vp, 1.0);"
-//                "}";
-
-
-        const char *fragment_shader = R"(#version 400
+		const char *fragment_shader = R"(
+				#version 400
+				uniform vec4 input_color = vec4(1.0, 0.0, 0.0, 1.0);
 				out vec4 frag_colour;
                 void main() {
-                  frag_colour = vec4(0.5, 0.5, 0.5, 1.0);
+				  frag_colour = input_color;
                 })";
 
 #if 0
@@ -110,7 +111,8 @@ struct triangle_renderer
         shader_p.set_source(fragment_shader,shader::fragment);
         shader_p.set_source(vertex_shader,shader::vertex);
 
-        shader_p.build();
+		if (!shader_p.build())
+			exit(-1);
 
 
     }
@@ -118,9 +120,20 @@ struct triangle_renderer
     void draw()
     {
 		shader_p.use();
-        glBindVertexArray(vao);
+
+
+		static float v = 0.0f;
+		v+= 0.01f;
+		if (v>1.0f) v = 0.0f;
+		vector4f test({0.5f,1-v,v,1.0f});
+
+		shader_p.bind("input_color",test);
+
+		amesh_renderer.draw();
+
+//        glBindVertexArray(vao);
         // draw points 0-3 from the currently bound VAO with current in-use shader
-        glDrawArrays(GL_TRIANGLES, 0, 3);
+//        glDrawArrays(GL_TRIANGLES, 0, 3);
     }
 };
 

src/visual/src/shader.cpp

@@ -29,7 +29,7 @@ struct shader::impl
 		return glIsProgram(_shader_program);
 	}
 
-	void build()
+	bool build()
 	{
 
 		for (auto s : _shader._source)
@@ -75,7 +75,7 @@ struct shader::impl
 				// TODO - handle errors!
 				debug::e() << log_buffer.get();
 
-				break;
+				return false;
 			}
 
 			_shader_stages.push_back(shaderId);
@@ -120,8 +120,10 @@ struct shader::impl
 			/* Handle the error in an appropriate way such as displaying a message or writing to a log file. */
 			/* In this simple program, we'll just leave */
 
-			return;
+			return false;
 		}
+
+		return true;
 	}
 
 
@@ -142,14 +144,24 @@ struct shader::impl
 		}
 	}
 
-	int uniform_location(std::string const& name)
+	int uniform_location(std::string const& name) const
 	{
 		return glGetUniformLocation(_shader_program,name.c_str());
 	}
 
 	void bind(int location,const matrix4x4f& m)
 	{
-        glUniformMatrix4fv(location,1,GL_FALSE,m.data); // TODO transpose?
+		glUniformMatrix4fv(location,1,GL_FALSE,m.data);
+	}
+
+	void bind(int location,const vector4f& v)
+	{
+		glUniform4fv(location,1,v.data);
+	}
+
+	void bind(int location,const float& v)
+	{
+		glUniform1f(location,v);
 	}
 };
 
@@ -169,9 +181,14 @@ bool shader::ready() const
 	return _impl->is_valid();
 }
 
-void shader::build()
+shader &shader::bind(int location, const vector4f &v)
 {
-    _impl->build();
+	_impl->bind(location,v); return *this;
+}
+
+bool shader::build()
+{
+	return _impl->build();
 }
 
 void shader::use()
@@ -179,7 +196,7 @@ void shader::use()
     _impl->use();
 }
 
-int shader::uniform_location(const std::string &name)
+int shader::uniform_location(const std::string &name) const
 {
 	return _impl->uniform_location(name);
 }

src/visual/src/shader/unlit_fs.glsl

@@ -0,0 +1,5 @@
+#version 400
+out vec4 frag_colour;
+void main() {
+	frag_colour = vec4(0.5, 0.5, 0.5, 1.0);
+}

src/visual/src/shader/unlit_vs.glsl

@@ -0,0 +1,5 @@
+#version 400
+in vec3 vp;
+void main() {
+	gl_Position = vec4(vp, 1.0);
+}