Main: add basic lightning
This commit is contained in:
0xdeadbeer
parent
d5429ad5af
commit
a48ab901cb
1
.gitignore
vendored
1
.gitignore
vendored
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@ -2,3 +2,4 @@
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cmake-build-debug/
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build/
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.ccls-cache/
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*.mtl
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@ -3,12 +3,16 @@ project(ssts C)
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set(SOURCE_FILES main.c)
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set(HEADER_FILES )
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set(SHADER_FILES shader.vert shader.frag)
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foreach(SHADER IN LISTS SHADER_FILES)
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configure_file(${SHADER} ${CMAKE_CURRENT_BINARY_DIR} COPYONLY)
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endforeach()
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add_executable(${PROJECT_NAME} ${HEADER_FILES} ${SOURCE_FILES} ${SHADER_FILES})
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add_executable(${PROJECT_NAME} ${HEADER_FILES} ${SOURCE_FILES})
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# dependencies
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add_custom_target(assets ALL
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COMMAND ${CMAKE_COMMAND} -E copy_directory
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${PROJECT_SOURCE_DIR}/assets
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${PROJECT_BINARY_DIR}/assets
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COMMENT "Copying assets to build folder")
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add_dependencies(ssts assets)
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# We need a CMAKE_DIR with some code to find external dependencies
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set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} "${CMAKE_SOURCE_DIR}/cmake/")
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@ -21,5 +25,4 @@ find_package(assimp REQUIRED)
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find_package(cglm REQUIRED)
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include_directories(${PROJECT_NAME} ${OPENGL_INCLUDE_DIRS} ${GLUT_INCLUDE_DIRS} ${GLEW_INCLUDE_DIRS} ${ASSIMP_INCLUDE_DIRS} ${CGLM_INCLUDE_DIRS})
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target_link_libraries(${PROJECT_NAME} ${OPENGL_LIBRARIES} ${GLUT_LIBRARIES} ${GLEW_LIBRARIES} ${ASSIMP_LIBRARIES} ${CGLM_LIBRARIES} m)
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40
assets/models/kub.obj
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assets/models/kub.obj
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@ -0,0 +1,40 @@
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# Blender 3.6.4
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# www.blender.org
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mtllib kub.mtl
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o Cube
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s 0
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usemtl Material
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f 1/1/1 5/2/1 7/3/1 3/4/1
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f 4/5/2 3/4/2 7/6/2 8/7/2
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f 8/8/3 7/9/3 5/10/3 6/11/3
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f 6/12/4 2/13/4 4/5/4 8/14/4
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f 2/13/5 1/1/5 3/4/5 4/5/5
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f 6/11/6 5/10/6 1/1/6 2/13/6
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2075
assets/models/monkey.obj
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assets/models/monkey.obj
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Load Diff
2067
assets/models/monkey_flat.obj
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assets/models/monkey_flat.obj
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File diff suppressed because it is too large
Load Diff
2070
assets/models/sphere.obj
Normal file
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assets/models/sphere.obj
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File diff suppressed because it is too large
Load Diff
11973
assets/models/statue.obj
Normal file
11973
assets/models/statue.obj
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File diff suppressed because it is too large
Load Diff
722
assets/models/tower.obj
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assets/models/tower.obj
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@ -0,0 +1,722 @@
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# Blender v3.6.4 OBJ File: 'tower.blend'
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# www.blender.org
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mtllib tower.mtl
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o tower_mesh
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usemtl Material
|
||||
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|
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|
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f 127/276/11 131/277/11 124/278/11 123/279/11
|
||||
f 129/280/13 126/281/13 125/282/13 132/283/13
|
||||
f 133/284/1 134/285/1 135/286/1 136/287/1
|
||||
f 137/288/22 138/289/22 139/290/22 140/291/22
|
||||
f 140/292/10 135/293/10 134/294/10 141/295/10
|
||||
f 142/296/23 141/297/23 134/298/23 133/299/23
|
||||
f 138/300/12 142/301/12 133/302/12 136/303/12
|
||||
f 143/304/1 144/305/1 145/306/1 146/307/1
|
||||
f 147/308/22 148/309/22 149/310/22 150/311/22
|
||||
f 150/312/10 145/313/10 144/314/10 151/315/10
|
||||
f 152/316/23 151/317/23 144/318/23 143/319/23
|
||||
f 148/320/12 152/321/12 143/322/12 146/323/12
|
||||
f 38/81/29 33/324/29 36/325/29 37/82/29
|
||||
f 39/85/30 34/326/30 33/327/30 38/86/30
|
||||
f 48/101/31 47/328/31 46/329/31 49/102/31
|
||||
f 49/113/32 46/330/32 45/331/32 50/114/32
|
||||
f 59/125/31 58/332/31 57/333/31 60/126/31
|
||||
f 61/129/29 55/334/29 58/335/29 59/130/29
|
||||
f 81/180/32 79/336/32 78/337/32 82/181/32
|
||||
f 91/200/32 89/338/32 88/339/32 92/201/32
|
||||
f 102/216/30 98/340/30 97/341/30 101/217/30
|
||||
f 112/236/30 108/342/30 107/343/30 111/237/30
|
||||
f 121/252/31 120/344/31 119/345/31 122/253/31
|
||||
f 131/272/31 130/346/31 129/347/31 132/273/31
|
||||
f 142/296/29 137/348/29 140/349/29 141/297/29
|
||||
f 152/316/29 147/350/29 150/351/29 151/317/29
|
||||
f 70/161/33 68/352/33 67/353/33 72/162/33
|
||||
f 72/157/34 67/354/34 66/355/34 71/158/34
|
||||
f 153/356/35 154/357/35 155/358/35
|
||||
f 154/359/36 156/360/36 155/358/36
|
||||
f 156/361/37 157/362/37 155/358/37
|
||||
f 155/358/38 157/363/38 153/364/38
|
||||
f 31/78/10 36/77/10 35/365/10
|
||||
f 35/89/13 34/366/13 39/90/13
|
||||
f 44/105/11 47/367/11 48/106/11
|
||||
f 40/110/12 45/109/12 44/368/12
|
||||
f 56/133/12 55/369/12 61/134/12
|
||||
f 54/138/13 57/137/13 56/370/13
|
||||
f 69/149/10 68/371/10 70/150/10
|
||||
f 63/154/11 66/153/11 69/372/11
|
||||
f 80/172/10 79/373/10 81/173/10
|
||||
f 73/177/12 78/176/12 77/374/12
|
||||
f 90/192/10 89/375/10 91/193/10
|
||||
f 83/197/12 88/196/12 87/376/12
|
||||
f 94/213/11 97/212/11 100/377/11
|
||||
f 99/220/13 98/378/13 102/221/13
|
||||
f 104/233/11 107/232/11 110/379/11
|
||||
f 109/240/13 108/380/13 112/241/13
|
||||
f 117/256/11 120/381/11 121/257/11
|
||||
f 116/261/13 119/260/13 118/382/13
|
||||
f 127/276/11 130/383/11 131/277/11
|
||||
f 126/281/13 129/280/13 128/384/13
|
||||
f 135/293/10 140/292/10 139/385/10
|
||||
f 138/300/12 137/386/12 142/301/12
|
||||
f 145/313/10 150/312/10 149/387/10
|
||||
f 148/320/12 147/388/12 152/321/12
|
||||
23015
assets/models/tree.obj
Normal file
23015
assets/models/tree.obj
Normal file
File diff suppressed because it is too large
Load Diff
15
assets/shaders/shader.frag
Normal file
15
assets/shaders/shader.frag
Normal file
|
|
@ -0,0 +1,15 @@
|
|||
#version 330 core
|
||||
in vec4 frag_pos;
|
||||
in vec4 frag_normal;
|
||||
out vec4 output;
|
||||
|
||||
void main() {
|
||||
vec4 ambient = vec4(0.0, 0.2, 0.46, 1.0);
|
||||
|
||||
vec4 light_location = vec4(0.0, 10.0, 20.0, 0.0);
|
||||
vec4 light_color = vec4(0.1, 0.1, 0.2, 1.0);
|
||||
vec4 light_distance = frag_pos - light_location;
|
||||
float inverted_dot = -dot(frag_normal.xyz, light_distance.xyz);
|
||||
|
||||
output = ambient * light_color * inverted_dot;
|
||||
}
|
||||
|
|
@ -1,14 +1,16 @@
|
|||
#version 330 core
|
||||
layout (location = 0) in vec3 pos;
|
||||
layout (location = 1) in vec3 col;
|
||||
layout (location = 1) in vec3 normal;
|
||||
|
||||
uniform mat4 model;
|
||||
uniform mat4 view;
|
||||
uniform mat4 projection;
|
||||
|
||||
out vec3 color;
|
||||
out vec4 frag_pos;
|
||||
out vec4 frag_normal;
|
||||
|
||||
void main() {
|
||||
gl_Position = projection * view * model * vec4(pos.xyz, 1.0);
|
||||
color = col;
|
||||
frag_pos = gl_Position;
|
||||
frag_normal = model * vec4(normal.xyz, 1.0);
|
||||
}
|
||||
134
main.c
134
main.c
|
|
@ -1,24 +1,39 @@
|
|||
#include <stdio.h>
|
||||
#include <stdlib.h>
|
||||
#include <unistd.h>
|
||||
#include <GL/glew.h>
|
||||
#include <GL/freeglut.h>
|
||||
#include <unistd.h>
|
||||
#include <cglm/cglm.h>
|
||||
#include <assimp/cimport.h>
|
||||
#include <assimp/scene.h>
|
||||
#include <assimp/postprocess.h>
|
||||
|
||||
unsigned int vao;
|
||||
unsigned int vbo;
|
||||
unsigned int ebo;
|
||||
unsigned int nbo;
|
||||
unsigned int shader_program;
|
||||
unsigned int vertex_shader;
|
||||
unsigned int fragment_shader;
|
||||
|
||||
const char *vertex_shader_location = "../shader.vert";
|
||||
const char *fragment_shader_location = "../shader.frag";
|
||||
// shaders
|
||||
const char *vertex_shader_location = "../assets/shaders/shader.vert";
|
||||
const char *fragment_shader_location = "../assets/shaders/shader.frag";
|
||||
|
||||
float vertices[] = {
|
||||
// positions // colors
|
||||
0.5f, -0.5f, 0.0f, 1.0f, 0.0f, 0.0f, // bottom right
|
||||
-0.5f, -0.5f, 0.0f, 0.0f, 1.0f, 0.0f, // bottom left
|
||||
0.0f, 0.5f, 0.0f, 0.0f, 0.0f, 1.0f // top
|
||||
};
|
||||
// GPU data
|
||||
float *vertices = NULL;
|
||||
unsigned int *indices = NULL;
|
||||
float *normals = NULL;
|
||||
long vertices_num = 0;
|
||||
long indices_num = 0;
|
||||
long normals_num = 0;
|
||||
|
||||
// Camera / LookAt
|
||||
vec3 camera_position;
|
||||
vec3 world_origin;
|
||||
vec3 up;
|
||||
vec3 right;
|
||||
vec3 forward;
|
||||
|
||||
int load_shader(const char *path, unsigned int shader) {
|
||||
FILE *fp = fopen(path, "r");
|
||||
|
|
@ -72,6 +87,67 @@ int load_shader(const char *path, unsigned int shader) {
|
|||
return 0;
|
||||
}
|
||||
|
||||
int load_model(const char *path) {
|
||||
const struct aiScene *scene = aiImportFile(path, aiProcess_Triangulate);
|
||||
|
||||
if (scene == NULL) {
|
||||
return -1;
|
||||
}
|
||||
|
||||
// allocate enough memory
|
||||
vertices = (float *) malloc(1);
|
||||
|
||||
for (int mesh_index = 0; mesh_index < scene->mNumMeshes; mesh_index++) {
|
||||
struct aiMesh *mesh = scene->mMeshes[mesh_index];
|
||||
fprintf(stdout, "Number of vertices in mesh %d: %d\n", mesh_index, mesh->mNumVertices);
|
||||
|
||||
// fetch vertices
|
||||
for (int vertex_index = 0; vertex_index < mesh->mNumVertices; vertex_index++) {
|
||||
struct aiVector3D *vertex = &(mesh->mVertices[vertex_index]);
|
||||
long start = vertices_num*3;
|
||||
|
||||
vertices_num++;
|
||||
vertices = (float *) realloc(vertices, vertices_num*3*sizeof(float));
|
||||
if (vertices == NULL) {
|
||||
return -1;
|
||||
}
|
||||
|
||||
memcpy(&vertices[start], vertex, sizeof(float)*3);
|
||||
}
|
||||
|
||||
// fetch indices
|
||||
for (int face_index = 0; face_index < mesh->mNumFaces; face_index++) {
|
||||
struct aiFace *face = &(mesh->mFaces[face_index]);
|
||||
long start = indices_num;
|
||||
|
||||
indices_num += face->mNumIndices;
|
||||
indices = (unsigned int *) realloc(indices, sizeof(unsigned int)*indices_num);
|
||||
if (indices == NULL) {
|
||||
return -1;
|
||||
}
|
||||
|
||||
memcpy(&indices[start], face->mIndices, sizeof(unsigned int)*face->mNumIndices);
|
||||
}
|
||||
|
||||
// fetch normals
|
||||
for (int normal_index = 0; normal_index < mesh->mNumVertices; normal_index++) {
|
||||
struct aiVector3D *normal = &(mesh->mNormals[normal_index]);
|
||||
long start = normals_num*3;
|
||||
|
||||
normals_num++;
|
||||
normals = (float *) realloc(normals, normals_num*3*sizeof(float));
|
||||
if (normals == NULL) {
|
||||
return -1;
|
||||
}
|
||||
|
||||
memcpy(&normals[start], normal, sizeof(float)*3);
|
||||
}
|
||||
}
|
||||
|
||||
aiReleaseImport(scene);
|
||||
return 0;
|
||||
}
|
||||
|
||||
int load_shaders() {
|
||||
glDeleteProgram(shader_program);
|
||||
shader_program = glCreateProgram();
|
||||
|
|
@ -112,13 +188,13 @@ int load_shaders() {
|
|||
return 0;
|
||||
}
|
||||
|
||||
float degs = 0;
|
||||
float deg = 0;
|
||||
|
||||
void display() {
|
||||
mat4 model;
|
||||
vec3 model_axis = {0.5f, 0.5f, 0.5f};
|
||||
vec3 model_axis = {1.0f, 1.0f, 0.0f};
|
||||
mat4 view;
|
||||
vec3 view_translate = {0.0f, 0.0f, -3.0f};
|
||||
vec3 view_translate = {0.0f, 0.0f, -10.0f};
|
||||
mat4 projection;
|
||||
GLint viewport[4]; // viewport: x, y, width, height
|
||||
|
||||
|
|
@ -126,15 +202,14 @@ void display() {
|
|||
GLint view_uniform;
|
||||
GLint projection_uniform;
|
||||
|
||||
glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
|
||||
glClear(GL_COLOR_BUFFER_BIT);
|
||||
glClearColor(0.13f, 0.13f, 0.13f, 0.0f);
|
||||
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
|
||||
|
||||
glGetIntegerv(GL_VIEWPORT, viewport);
|
||||
|
||||
glm_mat4_identity(model);
|
||||
|
||||
glm_rotate(model, glm_rad((float) degs ), model_axis);
|
||||
degs += 0.01f;
|
||||
glm_rotate(model, glm_rad((float)deg), model_axis);
|
||||
deg += 1;
|
||||
|
||||
model_uniform = glGetUniformLocation(shader_program, "model");
|
||||
glUniformMatrix4fv(model_uniform, 1, GL_FALSE, (float *) model);
|
||||
|
|
@ -154,7 +229,7 @@ void display() {
|
|||
glUseProgram(shader_program);
|
||||
glBindVertexArray(vao);
|
||||
|
||||
glDrawArrays(GL_TRIANGLES, 0, 3);
|
||||
glDrawElements(GL_TRIANGLES, indices_num, GL_UNSIGNED_INT, (void *) 0);
|
||||
|
||||
glutSwapBuffers();
|
||||
glutPostRedisplay();
|
||||
|
|
@ -188,8 +263,15 @@ int setup() {
|
|||
return -1;
|
||||
}
|
||||
|
||||
if (load_model("assets/models/sphere.obj") == -1) {
|
||||
fprintf(stderr, "Error: loading model\n");
|
||||
return -1;
|
||||
}
|
||||
|
||||
glGenVertexArrays(1, &vao);
|
||||
glGenBuffers(1, &vbo);
|
||||
glGenBuffers(1, &ebo);
|
||||
glGenBuffers(1, &nbo);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
|
@ -198,20 +280,30 @@ void post_setup() {
|
|||
glBindVertexArray(vao);
|
||||
|
||||
glBindBuffer(GL_ARRAY_BUFFER, vbo);
|
||||
glBufferData(GL_ARRAY_BUFFER, sizeof(vertices), vertices, GL_STATIC_DRAW);
|
||||
glBufferData(GL_ARRAY_BUFFER, 3*vertices_num*sizeof(float), vertices, GL_STATIC_DRAW);
|
||||
|
||||
glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 6 * sizeof(float), (void*) 0);
|
||||
glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 3 * sizeof(float), (void*) 0);
|
||||
glEnableVertexAttribArray(0);
|
||||
|
||||
glVertexAttribPointer(1, 3, GL_FLOAT, GL_FALSE, 6 * sizeof(float), (void *) (3 * sizeof(float)));
|
||||
glBindBuffer(GL_ARRAY_BUFFER, nbo);
|
||||
glBufferData(GL_ARRAY_BUFFER, 3*normals_num*sizeof(float), normals, GL_STATIC_DRAW);
|
||||
|
||||
glVertexAttribPointer(1, 3, GL_FLOAT, GL_FALSE, 3 * sizeof(float), (void*) 0);
|
||||
glEnableVertexAttribArray(1);
|
||||
|
||||
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, ebo);
|
||||
glBufferData(GL_ELEMENT_ARRAY_BUFFER, indices_num*sizeof(unsigned int), indices, GL_STATIC_DRAW);
|
||||
|
||||
|
||||
glBindVertexArray(0);
|
||||
glBindBuffer(GL_ARRAY_BUFFER, 0);
|
||||
|
||||
glEnable(GL_DEPTH_TEST);
|
||||
}
|
||||
|
||||
int main(int argc, char **argv) {
|
||||
glutInit(&argc, argv);
|
||||
glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE);
|
||||
glutCreateWindow("Simple Space Time Simulator");
|
||||
GLenum err = glewInit();
|
||||
if (err != GLEW_OK) {
|
||||
|
|
|
|||
|
|
@ -1,8 +0,0 @@
|
|||
#version 330 core
|
||||
in vec3 color;
|
||||
out vec4 output;
|
||||
|
||||
void main() {
|
||||
output = vec4(color.xyz, 1.0f);
|
||||
// output = vec4(1.0, 1.0, 1.0, 1.0);
|
||||
}
|
||||
Loading…
Reference in New Issue
Block a user