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Diffuse lighting and sending the normals to shaders

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Ben
2019-02-18 14:27:35 +00:00
parent d2775830d5
commit 078d4e52bf
12 changed files with 800 additions and 129 deletions
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src/shader.cpp.s:
$(MAKE) -f CMakeFiles/output.dir/build.make CMakeFiles/output.dir/src/shader.cpp.s
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# Help Target
help:
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@echo "... all (the default if no target is provided)"
@echo "... clean"
@echo "... depend"
@echo "... rebuild_cache"
@echo "... output"
@echo "... edit_cache"
@echo "... src/glad.o"
@echo "... src/glad.i"
@echo "... src/glad.s"
@echo "... src/main.o"
@echo "... src/main.i"
@echo "... src/main.s"
@echo "... src/object.o"
@echo "... src/object.i"
@echo "... src/object.s"
@echo "... src/shader.o"
@echo "... src/shader.i"
@echo "... src/shader.s"
.PHONY : help
#=============================================================================
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# because they might be regenerated.
cmake_check_build_system:
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49
OpenGL/playground/cmake_install.cmake Normal file
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@@ -0,0 +1,49 @@
# Install script for directory: /home/ben/Programming/examples/OpenGL/playground
# Set the install prefix
if(NOT DEFINED CMAKE_INSTALL_PREFIX)
set(CMAKE_INSTALL_PREFIX "/usr/local")
endif()
string(REGEX REPLACE "/$" "" CMAKE_INSTALL_PREFIX "${CMAKE_INSTALL_PREFIX}")
# Set the install configuration name.
if(NOT DEFINED CMAKE_INSTALL_CONFIG_NAME)
if(BUILD_TYPE)
string(REGEX REPLACE "^[^A-Za-z0-9_]+" ""
CMAKE_INSTALL_CONFIG_NAME "${BUILD_TYPE}")
else()
set(CMAKE_INSTALL_CONFIG_NAME "Debug")
endif()
message(STATUS "Install configuration: \"${CMAKE_INSTALL_CONFIG_NAME}\"")
endif()
# Set the component getting installed.
if(NOT CMAKE_INSTALL_COMPONENT)
if(COMPONENT)
message(STATUS "Install component: \"${COMPONENT}\"")
set(CMAKE_INSTALL_COMPONENT "${COMPONENT}")
else()
set(CMAKE_INSTALL_COMPONENT)
endif()
endif()
# Install shared libraries without execute permission?
if(NOT DEFINED CMAKE_INSTALL_SO_NO_EXE)
set(CMAKE_INSTALL_SO_NO_EXE "1")
endif()
# Is this installation the result of a crosscompile?
if(NOT DEFINED CMAKE_CROSSCOMPILING)
set(CMAKE_CROSSCOMPILING "FALSE")
endif()
if(CMAKE_INSTALL_COMPONENT)
set(CMAKE_INSTALL_MANIFEST "install_manifest_${CMAKE_INSTALL_COMPONENT}.txt")
else()
set(CMAKE_INSTALL_MANIFEST "install_manifest.txt")
endif()
string(REPLACE ";" "\n" CMAKE_INSTALL_MANIFEST_CONTENT
"${CMAKE_INSTALL_MANIFEST_FILES}")
file(WRITE "/home/ben/Programming/examples/OpenGL/playground/${CMAKE_INSTALL_MANIFEST}"
"${CMAKE_INSTALL_MANIFEST_CONTENT}")

BIN
OpenGL/playground/output Normal file → Executable file
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Binary file not shown.

25
OpenGL/playground/resources/shaders/phong.frag Normal file
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@@ -0,0 +1,25 @@
#version 330
in vec3 Normal;
in vec3 FragPos;
uniform vec3 lightPos;
out vec4 outColour;
vec3 objectColour = vec3(0.58, 0.61, 0.627);
vec3 lightColour = vec3(0.0, 1.0, 1.0);
void main() {
float ambientStrength = 0.5;
vec3 ambient = ambientStrength * lightColour;
vec3 norm = normalize(Normal);
vec3 lightDir = normalize(lightPos - FragPos);
float diff = max(dot(norm, lightDir), 0.0);
vec3 diffuse = diff * lightColour;
vec3 result = (ambient + diffuse) * objectColour;
outColour = vec4(result, 1.0);
}

17
OpenGL/playground/resources/shaders/phong.vert Normal file
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@@ -0,0 +1,17 @@
#version 330
in vec3 position;
in vec3 normal;
out vec3 Normal;
out vec3 FragPos;
uniform mat4 model;
uniform mat4 view;
uniform mat4 proj;
void main() {
gl_Position = proj * view * model * vec4(position, 1.0);
FragPos = vec3(model * vec4(position, 1.0));
Normal = normal;
}

35
OpenGL/playground/src/main.cpp
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@@ -56,7 +56,7 @@ int main(int argc, char** argv) {
window = SDL_CreateWindow("OpenGL Playground V1.0",
SDL_WINDOWPOS_CENTERED,
SDL_WINDOWPOS_CENTERED,
1280, 720,
640, 480,
SDL_WINDOW_OPENGL);
glContext = SDL_GL_CreateContext(window);
SDL_GL_SetSwapInterval(0);
@@ -65,15 +65,17 @@ int main(int argc, char** argv) {
isWindowOpen = true;
logger << LOGGER_INFO << "OpenGL and SDL initialized" << LOGGER_ENDL;
// Load an object into system memory
std::vector<glm::vec4> vertices;
std::vector<glm::vec3> vertices;
std::vector<glm::vec3> normals;
std::vector<GLushort> elements;
LoadOBJ(logger, "./resources/dragon.obj", vertices, normals, elements);
std::vector<glm::vec3> toGPU;
toGPU.insert(toGPU.end(), vertices.begin(), vertices.end());
toGPU.insert(toGPU.end(), normals.begin(), normals.end());
// Generate a vertex array object
GLuint vao;
glGenVertexArrays(1, &vao);
@@ -86,7 +88,7 @@ int main(int argc, char** argv) {
// Bind buffer to the GPU
glBindBuffer(GL_ARRAY_BUFFER, vbo);
// Copy vertex data to the vertex buffer already on the GPU
glBufferData(GL_ARRAY_BUFFER, vertices.size() * sizeof(glm::vec4), &vertices[0], GL_STATIC_DRAW);
glBufferData(GL_ARRAY_BUFFER, toGPU.size() * sizeof(glm::vec3), &toGPU[0], GL_STATIC_DRAW);
// Generate another vertex buffer for the element array buffer
GLuint ebo;
@@ -98,15 +100,23 @@ int main(int argc, char** argv) {
// Load, compile, apply and link shader programs
Shader simpleShader{ logger };
simpleShader.load("./resources/shaders/simple").attatch().link().use();
simpleShader.load("./resources/shaders/phong").attatch().link().use();
GLint posAttrib = glGetAttribLocation(simpleShader.getProgram(), "position");
glEnableVertexAttribArray(posAttrib);
glVertexAttribPointer(posAttrib, 4, GL_FLOAT, GL_FALSE, 0, 0);
glVertexAttribPointer(posAttrib, 3, GL_FLOAT, GL_FALSE, 0, 0);
GLint normalAttrib = glGetAttribLocation(simpleShader.getProgram(), "normal");
glEnableVertexAttribArray(normalAttrib);
glVertexAttribPointer(normalAttrib, 3, GL_FLOAT, GL_FALSE, 0, (const void*)(vertices.size() * sizeof(glm::vec3)));
glm::vec3 lightPos(2.20, 1.0f, 2.0f);
GLint uniLight = glGetUniformLocation(simpleShader.getProgram(), "lightPos");
glUniform3fv(uniLight, 1, GL_FALSE, glm::value_ptr(lightPos));
// Model matrice
glm::mat4 model = glm::mat4(1.0f);
model = glm::translate(model, {-20.0f, -20.0f, -20.0f});
model = glm::translate(model, {-10.0f, -10.0f, -10.0f});
// Gets uniform for model matrice, to be used later
GLint uniTrans = glGetUniformLocation(simpleShader.getProgram(), "model");
@@ -121,7 +131,7 @@ int main(int argc, char** argv) {
glUniformMatrix4fv(uniView, 1, GL_FALSE, glm::value_ptr(view));
// Projection matrice
glm::mat4 proj = glm::perspective(glm::radians(45.0f), 1280.0f / 720.0f, 1.0f, 1000.0f);
glm::mat4 proj = glm::perspective(glm::radians(45.0f), 640.0f / 480.0f, 1.0f, 1000.0f);
// Get uniform and send it to the GPU
GLint uniProj = glGetUniformLocation(simpleShader.getProgram(), "proj");
glUniformMatrix4fv(uniProj, 1, GL_FALSE, glm::value_ptr(proj));
@@ -135,8 +145,9 @@ int main(int argc, char** argv) {
// Update tick (60ups)
if (UPSTimer()) {
model = glm::rotate(model, glm::radians(0.5f), glm::vec3(0.0f, 0.0f, 1.0f));
model = glm::rotate(model, glm::radians(0.5f), glm::vec3(1.0f, 0.0f, 0.0f));
// model = glm::rotate(model, glm::radians(0.5f), glm::vec3(0.0f, 0.0f, 1.0f));
// model = glm::rotate(model, glm::radians(0.5f), glm::vec3(1.0f, 0.0f, 0.0f));
model = glm::rotate(model, glm::radians(0.5f), glm::vec3(0.0f, 1.0f, 0.0f));
glm::vec4 result = model * glm::vec4(1.0f, 0.0f, 0.0f, 1.0f);
glUniformMatrix4fv(uniTrans, 1, GL_FALSE, glm::value_ptr(model));

24
OpenGL/playground/src/object.cpp
View File

@@ -3,7 +3,7 @@
#include <fstream>
// https://en.wikibooks.org/wiki/OpenGL_Programming/Modern_OpenGL_Tutorial_Load_OBJ
void LoadOBJ(Logger& logger, std::string file, std::vector<glm::vec4>& vertices, std::vector<glm::vec3>& normals, std::vector<GLushort>& elements) {
void LoadOBJ(Logger& logger, std::string file, std::vector<glm::vec3>& vertices, std::vector<glm::vec3>& normals, std::vector<GLushort>& elements) {
std::ifstream in(file, std::ios::in);
if (!in) {
logger << LOGGER_ERROR << "Cannot open " << file << LOGGER_ENDL;
@@ -14,7 +14,7 @@ void LoadOBJ(Logger& logger, std::string file, std::vector<glm::vec4>& vertices,
while (getline(in, line)) {
if (line.substr(0,2) == "v ") {
std::istringstream s(line.substr(2));
glm::vec4 v; s >> v.x; s >> v.y; s >> v.z; v.w = 1.0f;
glm::vec3 v; s >> v.x; s >> v.y; s >> v.z;
vertices.push_back(v);
} else if (line.substr(0,2) == "f ") {
std::istringstream s(line.substr(2));
@@ -26,16 +26,16 @@ void LoadOBJ(Logger& logger, std::string file, std::vector<glm::vec4>& vertices,
else {}
}
// normals.resize(vertices.size(), glm::vec3(0.0, 0.0, 0.0));
// for (int i = 0; i < elements.size(); i += 3) {
// GLushort ia = elements[i];
// GLushort ib = elements[i+1];
// GLushort ic = elements[i+2];
// glm::vec3 normal = glm::normalize(glm::cross(
// glm::vec3(vertices[ib]) - glm::vec3(vertices[ia]),
// glm::vec3(vertices[ic]) - glm::vec3(vertices[ia])));
// normals[ia] = normals[ib] = normals[ic] = normal;
// }
normals.resize(vertices.size(), glm::vec3(0.0, 0.0, 0.0));
for (int i = 0; i < elements.size(); i += 3) {
GLushort ia = elements[i];
GLushort ib = elements[i+1];
GLushort ic = elements[i+2];
glm::vec3 normal = glm::normalize(glm::cross(
glm::vec3(vertices[ib]) - glm::vec3(vertices[ia]),
glm::vec3(vertices[ic]) - glm::vec3(vertices[ia])));
normals[ia] = normals[ib] = normals[ic] = normal;
}
logger << LOGGER_INFO << "Loaded OBJ: " << file << LOGGER_ENDL;
}

2
OpenGL/playground/src/object.h
View File

@@ -22,7 +22,7 @@
void LoadOBJ(Logger& logger,
std::string file,
std::vector<glm::vec4>& vertices,
std::vector<glm::vec3>& vertices,
std::vector<glm::vec3>& normals,
std::vector<GLushort>& elements);

104
dasdwdasdwdasdwdasdwdasdwdasdwdasdwdasdwdasdwdasdwdasdwdasdwdasdwdasdwdasdwdasdwdasdwdasdwdasdwdasdasdwdasdwdasdwdasdwdasdgjashdjwhdjdopasjdfkihwjldhkjashdkjhjwkdhas
View File

@@ -1,104 +0,0 @@
SSUUMMMMAARRYY OOFF LLEESSSS CCOOMMMMAANNDDSS
Commands marked with * may be preceded by a number, _N.
Notes in parentheses indicate the behavior if _N is given.
A key preceded by a caret indicates the Ctrl key; thus ^K is ctrl-K.
h H Display this help.
q :q Q :Q ZZ Exit.
---------------------------------------------------------------------------
MMOOVVIINNGG
e ^E j ^N CR * Forward one line (or _N lines).
y ^Y k ^K ^P * Backward one line (or _N lines).
f ^F ^V SPACE * Forward one window (or _N lines).
b ^B ESC-v * Backward one window (or _N lines).
z * Forward one window (and set window to _N).
w * Backward one window (and set window to _N).
ESC-SPACE * Forward one window, but don't stop at end-of-file.
d ^D * Forward one half-window (and set half-window to _N).
u ^U * Backward one half-window (and set half-window to _N).
ESC-) RightArrow * Right one half screen width (or _N positions).
ESC-( LeftArrow * Left one half screen width (or _N positions).
ESC-} ^RightArrow Right to last column displayed.
ESC-{ ^LeftArrow Left to first column.
F Forward forever; like "tail -f".
ESC-F Like F but stop when search pattern is found.
r ^R ^L Repaint screen.
R Repaint screen, discarding buffered input.
---------------------------------------------------
Default "window" is the screen height.
Default "half-window" is half of the screen height.
---------------------------------------------------------------------------
SSEEAARRCCHHIINNGG
/_p_a_t_t_e_r_n * Search forward for (_N-th) matching line.
?_p_a_t_t_e_r_n * Search backward for (_N-th) matching line.
n * Repeat previous search (for _N-th occurrence).
N * Repeat previous search in reverse direction.
ESC-n * Repeat previous search, spanning files.
ESC-N * Repeat previous search, reverse dir. & spanning files.
ESC-u Undo (toggle) search highlighting.
&_p_a_t_t_e_r_n * Display only matching lines
---------------------------------------------------
A search pattern may be preceded by one or more of:
^N or ! Search for NON-matching lines.
^E or * Search multiple files (pass thru END OF FILE).
^F or @ Start search at FIRST file (for /) or last file (for ?).
^K Highlight matches, but don't move (KEEP position).
^R Don't use REGULAR EXPRESSIONS.
---------------------------------------------------------------------------
JJUUMMPPIINNGG
g < ESC-< * Go to first line in file (or line _N).
G > ESC-> * Go to last line in file (or line _N).
p % * Go to beginning of file (or _N percent into file).
t * Go to the (_N-th) next tag.
T * Go to the (_N-th) previous tag.
{ ( [ * Find close bracket } ) ].
} ) ] * Find open bracket { ( [.
ESC-^F _<_c_1_> _<_c_2_> * Find close bracket _<_c_2_>.
ESC-^B _<_c_1_> _<_c_2_> * Find open bracket _<_c_1_>
---------------------------------------------------
Each "find close bracket" command goes forward to the close bracket
matching the (_N-th) open bracket in the top line.
Each "find open bracket" command goes backward to the open bracket
matching the (_N-th) close bracket in the bottom line.
m_<_l_e_t_t_e_r_> Mark the current top line with <letter>.
M_<_l_e_t_t_e_r_> Mark the current bottom line with <letter>.
'_<_l_e_t_t_e_r_> Go to a previously marked position.
'' Go to the previous position.
^X^X Same as '.
ESC-M_<_l_e_t_t_e_r_> Clear a mark.
---------------------------------------------------
A mark is any upper-case or lower-case letter.
Certain marks are predefined:
^ means beginning of the file
$ means end of the file
---------------------------------------------------------------------------
CCHHAANNGGIINNGG FFIILLEESS
:e [_f_i_l_e] Examine a new file.
^X^V Same as :e.
:n * Examine the (_N-th) next file from the command line.
:p * Examine the (_N-th) previous file from the command line.
:x * Examine the first (or _N-th) file from the command line.
:d Delete the current file from the command line list.
= ^G :f Print current file name.
---------------------------------------------------------------------------
MMIISSCCEELLLLAANNEEOOUUSS CCOOMMMMAANNDDSS
-_<_f_l_a_g_> Toggle a command line option [see OPTIONS below].
--_<_n_a_m_e_> Toggle a command line option, by name.
__<_f_l_a_g_> Display the setting of a command line option.
___<_n_a_m_e_> Display the setting of an option, by name.
+_c_m_d Execute the less cmd each time a new file is examined.
!_c_o_m_m_a_n_d Execute the shell command with $SHELL.