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feat(engine): normals and texture

This commit is contained in:
gbrochar 2024-04-25 09:01:05 +02:00
parent dadd6998cb
commit 71e157e76f
5 changed files with 67 additions and 26 deletions
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1
inc/scop.h
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@ -78,6 +78,7 @@ struct s_env {
t_cam camera;
t_window window;
t_obj object;
double *vbo_data;
GLuint shader_program;
GLuint vertex_shader;
GLuint fragment_shader;

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resources/racer.jpg Normal file
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64
src/run.c
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@ -18,13 +18,14 @@
#include "stb_image.h"
GLuint VBO;
GLuint IBO;
//GLuint IBO;
GLuint gScaleLocation;
GLuint gScaleIntLocation;
GLuint gTimeLocation;
GLuint gProjLocation;
GLuint gViewLocation;
GLuint gModelLocation;
GLuint gCountLocation;
GLuint has_texture_location;
//GLuint gCountLocation;
GLuint index_count;
GLuint gSamplerLocation;
@ -38,9 +39,9 @@ static void RenderSceneCB(t_env *e)
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glEnable(GL_DEPTH_TEST);
static float Scale = 0.0f;
static float time = 0.0f;
Scale += 0.01f;
time += 0.01f;
t_vec3 eye;
t_vec3 up;
@ -63,25 +64,28 @@ static void RenderSceneCB(t_env *e)
t_mat4 model = mat4_scale(
mat4_rotatexyz(
mat4_translate(mat4_identity(), e->translate), e->rotate), e->scale);
glUniform1f(gScaleIntLocation, Scale);
glUniform1f(gTimeLocation, time);
glUniformMatrix4fv(gProjLocation, 1, GL_FALSE, (GLfloat *)proj.data);
glUniformMatrix4fv(gViewLocation, 1, GL_FALSE, (GLfloat *)view.data);
glUniformMatrix4fv(gModelLocation, 1, GL_FALSE, (GLfloat *)model.data);
glUniform1i(gCountLocation, index_count);
//glUniform1i(gCountLocation, index_count);
glActiveTexture(GL_TEXTURE0);
glUniform1i(gSamplerLocation, 0);
glEnableVertexAttribArray(0);
glBindBuffer(GL_ARRAY_BUFFER, VBO);
glVertexAttribPointer(0, 3, GL_DOUBLE, GL_FALSE, 0, 0);
glVertexAttribPointer(0, 3, GL_DOUBLE, GL_FALSE, 8 * sizeof(double), 0);
//layout text
//glVertexAttribPointer(2, 2, GL_DOUBLE, GL_FALSE, 0, 0);
glEnableVertexAttribArray(1);
glVertexAttribPointer(1, 2, GL_DOUBLE, GL_FALSE, 8 * sizeof(double), (void *)(3 * sizeof(double)));
glEnableVertexAttribArray(2);
glVertexAttribPointer(2, 3, GL_DOUBLE, GL_FALSE, 8 * sizeof(double), (void *)(5 * sizeof(double)));
//glBindTexture(GL_TEXTURE_2D, texture);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, IBO);
//glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, IBO);
glDrawElements(GL_TRIANGLES, index_count, GL_UNSIGNED_INT, 0);
//glDrawElements(GL_TRIANGLES, index_count * 3, GL_UNSIGNED_INT, 0);
glDrawArrays(GL_TRIANGLES, 0, index_count);
glDisableVertexAttribArray(0);
}
@ -95,12 +99,30 @@ static void CreateVertexBuffer(t_env *e)
printf("vertices indices len %ld\n", e->object.vertices_indices.ptr);
printf("uvs indices len %ld\n", e->object.uvs_indices.ptr);
printf("normals indices len %ld\n", e->object.normals_indices.ptr);
e->vbo_data = (double *)malloc(e->object.vertices_indices.ptr * 8 * sizeof(double));
for (size_t i = 0; i < e->object.vertices_indices.ptr * 8; i += 8) {
e->vbo_data[i] = e->object.vertices.data[e->object.vertices_indices.data[i / 8] * 3] * 0.3;
e->vbo_data[i + 1] = e->object.vertices.data[e->object.vertices_indices.data[i / 8] * 3 + 1] * 0.3;
e->vbo_data[i + 2] = e->object.vertices.data[e->object.vertices_indices.data[i / 8] * 3 + 2] * 0.3;
e->vbo_data[i + 3] = e->object.uvs.data[e->object.uvs_indices.data[i / 8] * 2];
e->vbo_data[i + 4] = e->object.uvs.data[e->object.uvs_indices.data[i / 8] * 2 + 1];
e->vbo_data[i + 5] = e->object.normals.data[e->object.normals_indices.data[i / 8] * 3];
e->vbo_data[i + 6] = e->object.normals.data[e->object.normals_indices.data[i / 8] * 3 + 1];
e->vbo_data[i + 7] = e->object.normals.data[e->object.normals_indices.data[i / 8] * 3 + 2];
}
glGenBuffers(1, &VBO);
glBindBuffer(GL_ARRAY_BUFFER, VBO);
glBufferData(GL_ARRAY_BUFFER, e->object.vertices_indices.ptr * 8 * sizeof(double), e->vbo_data, GL_STATIC_DRAW);
printf("Buffer created with success !\n");
/* glGenBuffers(1, &VBO);
glBindBuffer(GL_ARRAY_BUFFER, VBO);
glBufferData(GL_ARRAY_BUFFER, e->object.vertices.ptr * sizeof(double), e->object.vertices.data, GL_STATIC_DRAW);
glGenBuffers(1, &IBO);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, IBO);
glBufferData(GL_ELEMENT_ARRAY_BUFFER, e->object.vertices_indices.ptr * sizeof(int), e->object.vertices_indices.data, GL_STATIC_DRAW);
*/
}
static void AddShader(GLuint ShaderProgram, const char* pShaderText, GLenum ShaderType, GLuint *shader)
@ -190,13 +212,13 @@ static void CompileShaders(t_env *e)
glUseProgram(e->shader_program);
// gScaleLocation = glGetUniformLocation(e->shader_program, "gScale");
gScaleIntLocation = glGetUniformLocation(e->shader_program, "time");
gTimeLocation = glGetUniformLocation(e->shader_program, "time");
gProjLocation = glGetUniformLocation(e->shader_program, "proj");
gViewLocation = glGetUniformLocation(e->shader_program, "view");
gModelLocation = glGetUniformLocation(e->shader_program, "model");
gSamplerLocation = glGetUniformLocation(e->shader_program, "ourTexture");
// assert(gScaleLocation != 0xFFFFFFFF);
assert(gScaleIntLocation != 0xFFFFFFFF);
assert(gTimeLocation != 0xFFFFFFFF);
assert(gProjLocation != 0xFFFFFFFF);
assert(gViewLocation != 0xFFFFFFFF);
assert(gModelLocation != 0xFFFFFFFF);
@ -243,17 +265,17 @@ void key_callback(GLFWwindow *window, int key, int scancode, int action, int m
if (key == GLFW_KEY_H && (action == GLFW_PRESS || action == GLFW_REPEAT))
e->rotate.z -= 0.03;
if (key == GLFW_KEY_U && (action == GLFW_PRESS || action == GLFW_REPEAT))
e->scale.x += 0.03;
e->scale.x *= 1.03;
if (key == GLFW_KEY_J && (action == GLFW_PRESS || action == GLFW_REPEAT))
e->scale.x -= 0.03;
e->scale.x *= 0.97;
if (key == GLFW_KEY_I && (action == GLFW_PRESS || action == GLFW_REPEAT))
e->scale.y += 0.03;
e->scale.y *= 1.03;
if (key == GLFW_KEY_K && (action == GLFW_PRESS || action == GLFW_REPEAT))
e->scale.y -= 0.03;
e->scale.y *= 0.97;
if (key == GLFW_KEY_O && (action == GLFW_PRESS || action == GLFW_REPEAT))
e->scale.z += 0.03;
e->scale.z *= 1.03;
if (key == GLFW_KEY_L && (action == GLFW_PRESS || action == GLFW_REPEAT))
e->scale.z -= 0.03;
e->scale.z *= 0.97;
(void)scancode;
(void)mods;
}
@ -300,7 +322,7 @@ int run(t_env *e)
int tex_width, tex_height, nrChannels;
unsigned char *tex_data = stbi_load("resources/fox.jpg", &tex_width, &tex_height, &nrChannels, 0);
unsigned char *tex_data = stbi_load("resources/racer.jpg", &tex_width, &tex_height, &nrChannels, 0);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, tex_width, tex_height, 0, GL_RGB, GL_UNSIGNED_BYTE, tex_data);
glGenerateMipmap(GL_TEXTURE_2D);
stbi_image_free(tex_data);

14
src/shader.fs
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@ -5,6 +5,9 @@ uniform sampler2D ourTexture;
out vec4 FragColor;
flat in int vID;
in vec2 texCoord;
in vec3 position;
in vec3 normal;
float rand(float n)
@ -15,8 +18,11 @@ float rand(float n)
void main()
{
vec3 color = vec3(rand(float(vID + int(time))), rand(float(vID + int(time))), rand(float(vID + int(time))));
FragColor = vec4(color, 1.);
//FragColor = vec4(color * 0.001 + texture(ourTexture, gl_FragCoord.xy / vec2(480., 360.)).rgb, 1.0);
//FragColor = vec4(color * 0.1 + texture(ourTexture, gl_FragCoord.xy).rgb, 1.0);
//FragColor = vec4(color * 0.01 + texture2D(ourTexture, gl_FragCoord.xy / vec2(480., 360.)).rgb, 1.0);
vec3 n = normalize(vec3(50. * cos(time), 50., 50. * sin(time)) - position);
//vec3 n = normalize(vec3(0., 50., 0.) - position);
float phong = 0.2 + 0.8 * max(0., dot(n, normalize(normal)));
float specular = pow(max(dot(reflect(n, normalize(normal)), normalize(vec3(0, 0, -9) - position)), 0.), 10.);
FragColor = vec4(color * 0.001 + texture(ourTexture, texCoord).rgb * phong + vec3(1.) * specular, 1.);
//FragColor = vec4(color * 0.001 + vec3(0.5) * phong + vec3(1.) * specular, 1.);
//FragColor = vec4(color * 0.001 + normal, 1.);
}

14
src/shader.vs
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@ -1,6 +1,8 @@
#version 330
layout (location = 0) in vec3 Position;
layout (location = 1) in vec2 Uvs;
layout (location = 2) in vec3 Normal;
uniform float gScale;
uniform mat4 view;
@ -8,10 +10,20 @@ uniform mat4 proj;
uniform mat4 model;
flat out int vID;
out vec2 texCoord;
out vec3 position;
out vec3 normal;
void main()
{
gl_Position = proj * view * model * vec4(Position, 1.0);
vec4 test = proj * view * model * vec4(Position, 1.0);
gl_Position = test;
// gl_Position = vec4(gScale * Position.x,gScale * Position.y, gScale * Position.z, 1.0);
vID = gl_VertexID;
texCoord = Uvs;
mat4 normalMat = transpose(inverse(view * model));
position = Position;
normal = (normalMat * vec4(Normal, 1.)).xyz;
}