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Fix lightmapping

This commit is contained in:
Alexander Klingenbeck 2023-06-16 08:11:49 +02:00
parent 9341e134a1
commit 4f061d0ab8
3 changed files with 4460 additions and 41 deletions
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monkey.obj Normal file
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103
src/lightmapper_example.c
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@ -2,14 +2,16 @@
#include <stdlib.h>
#include <stdio.h>
#include <math.h>
#include <stddef.h>
#include <assert.h>
//#include "glad/glad.h"
#define GLAD_MALLOC(sz) malloc(sz)
#define GLAD_FREE(sz) free(sz)
//#define GLAD_GL_IMPLEMENTATION
#include "../thirdparty/raylib/src/external/glad.h"
#include "GLFW/glfw3.h"
//#include "GLFW/glfw3.h"
#include "raylib.h"
#include "rlgl.h"
#define LIGHTMAPPER_IMPLEMENTATION
#define LM_DEBUG_INTERPOLATION
@ -34,10 +36,10 @@ typedef struct
GLuint lightmap;
int w, h;
Model raylib_model;
GLuint vao, vbo, ibo;
vertex_t *vertices;
unsigned short *indices;
unsigned int vertexCount, indexCount;
//GLuint vao, vbo, ibo;
//vertex_t *vertices;
//unsigned short *indices;
//unsigned int vertexCount, indexCount;
} scene_t;
static int initScene(scene_t *scene);
@ -65,11 +67,13 @@ static int bake(scene_t *scene)
float *data = calloc(w * h * 4, sizeof(float));
lmSetTargetLightmap(ctx, data, w, h, 4);
Mesh m = scene->raylib_model.meshes[0];
lmSetGeometry(ctx, NULL, // no transformation in this example
LM_FLOAT, (unsigned char*)scene->vertices + offsetof(vertex_t, p), sizeof(vertex_t),
LM_FLOAT, (unsigned char*)m.vertices, 0,
LM_NONE , NULL , 0 , // no interpolated normals in this example
LM_FLOAT, (unsigned char*)scene->vertices + offsetof(vertex_t, t), sizeof(vertex_t),
scene->indexCount, LM_UNSIGNED_SHORT, scene->indices);
LM_FLOAT, (unsigned char*)m.texcoords, 0,
m.vertexCount, LM_NONE, 0);
int vp[4];
float view[16], projection[16];
@ -77,11 +81,11 @@ static int bake(scene_t *scene)
while (lmBegin(ctx, vp, view, projection))
{
// render to lightmapper framebuffer
glViewport(vp[0], vp[1], vp[2], vp[3]);
rlViewport(vp[0], vp[1], vp[2], vp[3]);
drawScene(scene, view, projection);
// display progress every second (printf is expensive)
double time = glfwGetTime();
double time = GetTime();
if (time - lastUpdateTime > 1.0)
{
lastUpdateTime = time;
@ -91,7 +95,7 @@ static int bake(scene_t *scene)
lmEnd(ctx);
}
printf("\rFinished baking %d triangles.\n", scene->indexCount / 3);
//printf("\rFinished baking %d triangles.\n", scene->indexCount / 3);
lmDestroy(ctx);
@ -107,13 +111,23 @@ static int bake(scene_t *scene)
lmImagePower(data, w, h, 4, 1.0f / 2.2f, 0x7); // gamma correct color channels
free(temp);
unsigned char *tempub = (unsigned char*)calloc(w * h * 4, sizeof(unsigned char));
lmImageFtoUB(data, tempub, w, h, 4, 1.0f);
Image im;
im.data = tempub;
im.format = PIXELFORMAT_UNCOMPRESSED_R8G8B8A8;
im.height = h;
im.width = w;
ExportImage(im,"result.png");
// upload result
rlUnloadTexture(scene->lightmap);
scene->lightmap = rlLoadTexture(tempub, w, h, RL_PIXELFORMAT_UNCOMPRESSED_R8G8B8A8, 1);
free(tempub);
// save result to a file
if (lmImageSaveTGAf("result.tga", data, w, h, 4, 1.0f))
printf("Saved result.tga\n");
// upload result
glBindTexture(GL_TEXTURE_2D, scene->lightmap);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, w, h, 0, GL_RGBA, GL_FLOAT, data);
free(data);
return 1;
@ -192,29 +206,33 @@ static GLuint loadProgram(const char *vp, const char *fp, const char **attribute
static int initScene(scene_t *scene)
{
// load mesh
//scene->raylib_model = LoadModel("thirdparty/lightmapper/example/gazebo.obj");
scene->raylib_model = LoadModel("thirdparty/lightmapper/example/gazebo.obj");
Mesh m = scene->raylib_model.meshes[0];
if(m.normals != NULL) puts("Has normals");
if(m.texcoords != NULL) puts("Has texcoords");
if(m.texcoords2 != NULL) puts("Has texcoords2");
//scene->vertices = myModel.meshes[0].
if (!loadSimpleObjFile("thirdparty/lightmapper/example/gazebo.obj", &scene->vertices, &scene->vertexCount, &scene->indices, &scene->indexCount))
{
fprintf(stderr, "Error loading obj file\n");
return 0;
}
// if (!loadSimpleObjFile("thirdparty/lightmapper/example/gazebo.obj", &scene->vertices, &scene->vertexCount, &scene->indices, &scene->indexCount))
// {
// fprintf(stderr, "Error loading obj file\n");
// return 0;
// }
glGenVertexArrays(1, &scene->vao);
glBindVertexArray(scene->vao);
// glGenVertexArrays(1, &scene->vao);
// glBindVertexArray(scene->vao);
glGenBuffers(1, &scene->vbo);
glBindBuffer(GL_ARRAY_BUFFER, scene->vbo);
glBufferData(GL_ARRAY_BUFFER, scene->vertexCount * sizeof(vertex_t), scene->vertices, GL_STATIC_DRAW);
// glGenBuffers(1, &scene->vbo);
// glBindBuffer(GL_ARRAY_BUFFER, scene->vbo);
// glBufferData(GL_ARRAY_BUFFER, scene->vertexCount * sizeof(vertex_t), scene->vertices, GL_STATIC_DRAW);
glGenBuffers(1, &scene->ibo);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, scene->ibo);
glBufferData(GL_ELEMENT_ARRAY_BUFFER, scene->indexCount * sizeof(unsigned short), scene->indices, GL_STATIC_DRAW);
// glGenBuffers(1, &scene->ibo);
// glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, scene->ibo);
// glBufferData(GL_ELEMENT_ARRAY_BUFFER, scene->indexCount * sizeof(unsigned short), scene->indices, GL_STATIC_DRAW);
glEnableVertexAttribArray(0);
glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, sizeof(vertex_t), (void*)offsetof(vertex_t, p));
glEnableVertexAttribArray(1);
glVertexAttribPointer(1, 2, GL_FLOAT, GL_FALSE, sizeof(vertex_t), (void*)offsetof(vertex_t, t));
// glEnableVertexAttribArray(0);
// glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, sizeof(vertex_t), (void*)offsetof(vertex_t, p));
// glEnableVertexAttribArray(1);
// glVertexAttribPointer(1, 2, GL_FLOAT, GL_FALSE, sizeof(vertex_t), (void*)offsetof(vertex_t, t));
// create lightmap texture
scene->w = 654;
@ -240,7 +258,7 @@ static int initScene(scene_t *scene)
"void main()\n"
"{\n"
"gl_Position = u_projection * (u_view * vec4(a_position, 1.0));\n"
"v_texcoord = a_texcoord;\n"
"v_texcoord = vec2(a_texcoord.x, a_texcoord.y);\n"
"}\n";
const char *fp =
@ -275,6 +293,7 @@ static int initScene(scene_t *scene)
static void drawScene(scene_t *scene, float *view, float *projection)
{
Mesh m = scene->raylib_model.meshes[0];
glEnable(GL_DEPTH_TEST);
glDisable(GL_BLEND);
@ -285,17 +304,19 @@ static void drawScene(scene_t *scene, float *view, float *projection)
glBindTexture(GL_TEXTURE_2D, scene->lightmap);
glBindVertexArray(scene->vao);
glDrawElements(GL_TRIANGLES, scene->indexCount, GL_UNSIGNED_SHORT, 0);
//glBindVertexArray(scene->vao);
//glDrawElements(GL_TRIANGLES, scene->indexCount, GL_UNSIGNED_SHORT, 0);
glBindVertexArray(m.vaoId);
glDrawArrays(GL_TRIANGLES, 0, m.vertexCount);
}
static void destroyScene(scene_t *scene)
{
free(scene->vertices);
free(scene->indices);
glDeleteVertexArrays(1, &scene->vao);
glDeleteBuffers(1, &scene->vbo);
glDeleteBuffers(1, &scene->ibo);
// free(scene->vertices);
// free(scene->indices);
// glDeleteVertexArrays(1, &scene->vao);
// glDeleteBuffers(1, &scene->vbo);
// glDeleteBuffers(1, &scene->ibo);
glDeleteTextures(1, &scene->lightmap);
glDeleteProgram(scene->program);
}