Makefile

@@ -1,4 +1,4 @@
-SOURCES = cpp/opengl/render_context_glx.cpp cpp/opengl/render_opengles.cpp cpp/math.cpp
+SOURCES = cpp/opengl/render_context_glx.cpp cpp/opengl/render_opengles.cpp cpp/math.cpp cpp/render.cpp
 OUTPUTFILE = engine.so
 
 CXXFLAGS = -fpic -Wall -Werror -O2 -flto -fomit-frame-pointer -ffast-math -funroll-loops -fno-rtti -fno-exceptions

__init__.py

@@ -16,13 +16,16 @@
 import ctypes
 import struct
 from array import array
-from pathlib import Path
 
-_lib = ctypes.cdll.LoadLibrary(Path(__file__).parent / "engine.so")
+_lib = ctypes.cdll.LoadLibrary("./engine/engine.so")
 
 def _flag(x):
     return 1 << x
 
+INPUT_IDENTITY = 0
+INPUT_VIEW_POSITION = 1
+INPUT_VIEW_ORIENTATION = 2
+
 TEXTURE_FORMAT_SRGB8_A8 = 0
 TEXTURE_FORMAT_RGBA8 = 1
 TEXTURE_FORMAT_RGB10_A2 = 2
@@ -159,28 +162,6 @@ def mat3_mul_mat3(ret, a, b):
     assert len(ret) == 9 and len(a) == 9 and len(b) == 9
     _mat3_mul_mat3(_mat3(ret), _mat3(a), _mat3(b))
 
-_mat4_projection = _lib.rk_mat4_projection
-_mat4_projection.argtypes = (
-    _mat4_t, # ret
-    ctypes.c_float, # hfov
-    ctypes.c_float, # ratio
-    ctypes.c_float, # near
-    ctypes.c_float) # far
-
-def mat4_projection(ret, hfov, ratio, near, far):
-    assert len(ret) == 16
-    _mat4_projection(_mat4(ret), hfov, ratio, near, far)
-
-_mat4_lookat = _lib.rk_mat4_lookat
-_mat4_lookat.argtypes = (
-    _mat4_t, # ret
-    _vec3_t, # position
-    _vec3_t) # lookat
-
-def mat4_lookat(ret, position, lookat):
-    assert len(ret) == 16 and len(position) == 3 and len(lookat) == 3
-    _mat4_lookat(_mat4(ret), _vec3(position), _vec3(lookat))
-
 _mat4_mul_vec4 = _lib.rk_mat4_mul_vec4
 _mat4_mul_vec4.argtypes = (
     _vec4_t, # ret
@@ -234,29 +215,12 @@ set_input_float.argtypes = (
 _set_input_vec3 = _lib.rk_set_input_vec3
 _set_input_vec3.argtypes = (
     ctypes.c_void_p, # input
-    _vec3_t) # value
+    _vec3_t, # value
+    ctypes.c_uint) # mode
 
-def set_input_vec3(input, value):
+def set_input_vec3(input, value, mode = INPUT_IDENTITY):
     assert len(value) == 3
-    _set_input_vec3(input, _vec3(value))
-
-_set_input_mat3 = _lib.rk_set_input_mat3
-_set_input_mat3.argtypes = (
-    ctypes.c_void_p, # input
-    _mat3_t) # value
-
-def set_input_mat3(input, value):
-    assert len(value) == 9
-    _set_input_mat3(input, _mat3(value))
-
-_set_input_mat4 = _lib.rk_set_input_mat4
-_set_input_mat4.argtypes = (
-    ctypes.c_void_p, # input
-    _mat4_t) # value
-
-def set_input_mat4(input, value):
-    assert len(value) == 16
-    _set_input_mat4(input, _mat4(value))
+    _set_input_vec3(input, _vec3(value), mode)
 
 _create_texture = _lib.rk_create_texture
 _create_texture.restype = ctypes.c_void_p
@@ -304,6 +268,22 @@ create_batch.argtypes = (
     ctypes.c_uint, # translation_format
     ctypes.c_uint) # orientation_format
 
+set_projection = _lib.rk_set_projection
+set_projection.argtypes = (
+    ctypes.c_float, # hfov
+    ctypes.c_float, # ratio
+    ctypes.c_float, # near
+    ctypes.c_float) # far
+
+_set_view = _lib.rk_set_view
+_set_view.argtypes = (
+    _vec3_t, # position
+    _vec3_t) # lookat
+
+def set_view(position, lookat):
+    assert len(position) == 3 and len(lookat) == 3
+    _set_view(_vec3(position), _vec3(lookat))
+
 begin_frame = _lib.rk_begin_frame
 
 select_texture = _lib.rk_select_texture

cpp/math.cpp

@@ -38,22 +38,6 @@ void rk_mat3_mul_mat3(
     ret = a * b;
 }
 
-void rk_mat4_projection(
-    rk_mat4 & ret,
-    float hfov,
-    float ratio,
-    float near,
-    float far) {
-    ret = glm::perspectiveRH(hfov, ratio, near, far);
-}
-
-void rk_mat4_lookat(
-    rk_mat4 & ret,
-    rk_vec3 const & position,
-    rk_vec3 const & lookat) {
-    ret = glm::lookAtRH(position, lookat, glm::vec3(0.0f, 0.0f, 1.0f));
-}
-
 void rk_mat4_mul_vec4(
     rk_vec4 & ret,
     rk_mat4 const & a,

cpp/math.hpp

@@ -41,18 +41,6 @@ RK_EXPORT void rk_mat3_mul_mat3(
     rk_mat3 const & a,
     rk_mat3 const & b);
 
-RK_EXPORT void rk_mat4_projection(
-    rk_mat4 & ret,
-    float hfov,
-    float ratio,
-    float near,
-    float far);
-
-RK_EXPORT void rk_mat4_lookat(
-    rk_mat4 & ret,
-    rk_vec3 const & position,
-    rk_vec3 const & lookat);
-
 RK_EXPORT void rk_mat4_mul_vec4(
     rk_vec4 & ret,
     rk_mat4 const & a,

cpp/opengl/render_opengles.cpp

@@ -18,6 +18,7 @@
 
 static rk_shader const * rk_current_shader = nullptr;
 static rk_vertices const * rk_current_vertices = nullptr;
+static bool rk_frame = false;
 
 static void rk_printf(char const * messsage) {
     printf("[RK_ENGINE] %s\n", messsage);
@@ -145,6 +146,10 @@ rk_shader_t rk_load_shader(
         rk_free_shader_source(fragment_source, fragment_length);
     }
 
+    shader->uniforms.view = glGetUniformLocation(shader->program, "u_view");
+    shader->uniforms.view_km = glGetUniformLocation(shader->program, "u_view_km");
+    shader->uniforms.projection = glGetUniformLocation(shader->program, "u_projection");
+
     return shader;
 }
 
@@ -154,6 +159,17 @@ void rk_select_shader(
     if (shader) {
         rk_current_shader = shader;
         glUseProgram(shader->program);
+        if (rk_frame) {
+            if (shader->uniforms.view > -1) {
+                glUniformMatrix4fv(shader->uniforms.view, 1, GL_FALSE, glm::value_ptr(rk_view));
+            }
+            if (shader->uniforms.view_km > -1) {
+                glUniformMatrix4fv(shader->uniforms.view_km, 1, GL_FALSE, glm::value_ptr(rk_view_km));
+            }
+            if (shader->uniforms.projection > -1) {
+                glUniformMatrix4fv(shader->uniforms.projection, 1, GL_FALSE, glm::value_ptr(rk_projection));
+            }
+        }
     }
 }
 
@@ -177,28 +193,23 @@ void rk_set_input_float(
 
 void rk_set_input_vec3(
     rk_input_t _input,
-    rk_vec3 const & value) {
+    rk_vec3 const & value,
+    rk_input_mode mode) {
     GLint const input = reinterpret_cast<intptr_t>(_input) - 1;
     if (rk_current_shader && input > -1) {
+        switch (mode) {
+            case RK_INPUT_IDENTITY:
                 glUniform3fv(input, 1, glm::value_ptr(value));
+                break;
+            case RK_INPUT_VIEW_POSITION: {
+                glUniform3fv(input, 1, glm::value_ptr(rk_view * rk_vec4(value, 1.0)));
+                break;
+            }
+            case RK_INPUT_VIEW_ORIENTATION: {
+                glUniform3fv(input, 1, glm::value_ptr(rk_view * rk_vec4(value, 0.0)));
+                break;
             }
-}
-
-void rk_set_input_mat3(
-    rk_input_t _input,
-    rk_mat3 const & value) {
-    GLint const input = reinterpret_cast<intptr_t>(_input) - 1;
-    if (rk_current_shader && input > -1) {
-        glUniformMatrix3fv(input, 1, GL_FALSE, glm::value_ptr(value));
         }
-}
-
-void rk_set_input_mat4(
-    rk_input_t _input,
-    rk_mat4 const & value) {
-    GLint const input = reinterpret_cast<intptr_t>(_input) - 1;
-    if (rk_current_shader && input > -1) {
-        glUniformMatrix4fv(input, 1, GL_FALSE, glm::value_ptr(value));
     }
 }
 
@@ -479,6 +490,7 @@ rk_batch_t rk_create_batch(
 }
 
 void rk_begin_frame() {
+    rk_frame = true;
     glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT);
 }
 
@@ -709,6 +721,7 @@ void rk_unselect_shader(
 
 void rk_end_frame() {
     rk_swap_buffers();
+    rk_frame = false;
 }
 
 void rk_destroy_batch(

cpp/opengl/render_opengles.hpp

@@ -27,10 +27,17 @@ enum : rk_uint {
     RK_PARAMS_BINDING = 1
 };
 
+struct rk_uniforms {
+    GLint view;
+    GLint view_km;
+    GLint projection;
+};
+
 struct rk_shader {
     GLuint vertex;
     GLuint fragment;
     GLuint program;
+    rk_uniforms uniforms;
 };
 
 struct rk_texture {

cpp/render.cpp

@@ -0,0 +1,48 @@
+// Copyright (C) 2022 RozK
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+#include "render.hpp"
+
+rk_vec3 rk_view_origin;
+rk_vec3 rk_view_lookat;
+rk_mat4 rk_view;
+rk_mat4 rk_view_km;
+
+float rk_projection_hfov;
+float rk_projection_ratio;
+float rk_projection_near;
+float rk_projection_far;
+rk_mat4 rk_projection;
+
+void rk_set_projection(
+    float hfov,
+    float ratio,
+    float near,
+    float far) {
+    rk_projection_hfov = hfov;
+    rk_projection_ratio = ratio;
+    rk_projection_near = near;
+    rk_projection_far = far;
+    rk_projection = glm::perspectiveRH(hfov, ratio, near, far);
+}
+
+extern void rk_set_view(
+    rk_vec3 const & position,
+    rk_vec3 const & lookat) {
+    rk_view_origin = position;
+    rk_view_lookat = lookat;
+    rk_view = glm::lookAtRH(position, lookat, glm::vec3(0.0f, 0.0f, 1.0f));
+    rk_view_km = glm::lookAtRH(position * 0.001f, lookat * 0.001f, glm::vec3(0.0f, 0.0f, 1.0f));
+}

cpp/render.hpp

@@ -19,6 +19,17 @@
 #include "types.hpp"
 #include "math.hpp"
 
+extern rk_vec3 rk_view_origin;
+extern rk_vec3 rk_view_lookat;
+extern rk_mat4 rk_view;
+extern rk_mat4 rk_view_km; //TODO: remove from engine
+
+extern float rk_projection_hfov;
+extern float rk_projection_ratio;
+extern float rk_projection_near;
+extern float rk_projection_far;
+extern rk_mat4 rk_projection;
+
 typedef rk_handle_t rk_window_t;
 typedef rk_handle_t rk_shader_t;
 typedef rk_handle_t rk_input_t;
@@ -29,6 +40,12 @@ typedef rk_handle_t rk_batch_t;
 
 #define RK_FLAG(bit) (1 << (bit))
 
+enum rk_input_mode : rk_uint {
+    RK_INPUT_IDENTITY = 0,
+    RK_INPUT_VIEW_POSITION = 1,
+    RK_INPUT_VIEW_ORIENTATION = 2
+};
+
 enum rk_texture_format : rk_uint {
     RK_TEXTURE_FORMAT_SRGB8_A8 = 0,
     RK_TEXTURE_FORMAT_RGBA8 = 1,
@@ -101,15 +118,8 @@ RK_EXPORT void rk_set_input_float(
 
 RK_EXPORT void rk_set_input_vec3(
     rk_input_t input,
-    rk_vec3 const & value);
-
-RK_EXPORT void rk_set_input_mat3(
-    rk_input_t input,
-    rk_mat3 const & value);
-
-RK_EXPORT void rk_set_input_mat4(
-    rk_input_t input,
-    rk_mat4 const & value);
+    rk_vec3 const & value,
+    rk_input_mode mode);
 
 RK_EXPORT rk_texture_t rk_create_texture(
     rk_uint slot,