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3d skeletal animation

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This commit is contained in:
John Alanbrook 2024-04-26 16:04:31 -05:00
parent 5af7d0a2e0
commit 0052a89c41
11 changed files with 369 additions and 184 deletions
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4
Makefile
View file

@ -66,7 +66,7 @@ else ifeq ($(OPT), 1)
CPPFLAGS += -O3 -flto
INFO :=$(INFO)_opt
else
CPPFLAGS += -O2
CPPFLAGS += -O0
endif
CPPFLAGS += -DHAVE_CEIL -DCP_USE_CGTYPES=0 -DCP_USE_DOUBLES=0 -DHAVE_FLOOR -DHAVE_FMOD -DHAVE_LRINT -DHAVE_LRINTF $(includeflag) -MD $(WARNING_FLAGS) -I. -DVER=\"$(SEM)\" -DCOM=\"$(COM)\" -DINFO=\"$(INFO)\" #-DENABLE_SINC_MEDIUM_CONVERTER -DENABLE_SINC_FAST_CONVERTER -DCP_COLLISION_TYPE_TYPE=uintptr_t -DCP_BITMASK_TYPE=uintptr_t
@ -204,7 +204,7 @@ shaders: $(SHADERS)
%.sglsl.h:%.sglsl
@echo Creating shader $^
./sokol-shdc --ifdef -i $^ --slang=glsl330:hlsl5:metal_macos:metal_ios:metal_sim:glsl300es -o $@
./sokol-shdc -r --ifdef -i $^ --slang=glsl330:hlsl5:metal_macos:metal_ios:metal_sim:glsl300es -o $@
SCRIPTS := $(shell ls scripts/*.js*)
CORE != (ls icons/* fonts/*)

327
source/engine/3d/model.c
View file

@ -3,7 +3,6 @@
#include "log.h"
#include "resources.h"
#include "stb_ds.h"
#include "font.h"
#include "gameobject.h"
//#include "diffuse.sglsl.h"
@ -16,11 +15,12 @@
#include "math.h"
#include "time.h"
#define CGLTF_IMPLEMENTATION
#include <cgltf.h>
#include <limits.h>
#include <stdlib.h>
#include <string.h>
#include "yugine.h"
#include "texture.h"
@ -32,7 +32,6 @@ static void processtexture();
static sg_shader model_shader;
static sg_pipeline model_pipe;
struct bone_weights {
char b1;
char b2;
@ -40,11 +39,11 @@ struct bone_weights {
char b4;
};
struct mesh_v {
HMM_Vec3 pos;
struct uv_n uv;
uint32_t norm;
struct bone_weights bones;
struct joints {
char j1;
char j2;
char j3;
char j4;
};
void model_init() {
@ -57,8 +56,16 @@ void model_init() {
[0].format = SG_VERTEXFORMAT_FLOAT3,
[1].format = SG_VERTEXFORMAT_USHORT2N,
[1].buffer_index = 1,
[2].format = SG_VERTEXFORMAT_FLOAT3,
[2].buffer_index = 2
[2].format = SG_VERTEXFORMAT_UINT10_N2,
[2].buffer_index = 2,
[3] = {
.format = SG_VERTEXFORMAT_UBYTE4N,
.buffer_index = 3
},
[4] = {
.format = SG_VERTEXFORMAT_UBYTE4,
.buffer_index = 4
}
},
},
.index_type = SG_INDEXTYPE_UINT16,
@ -90,59 +97,29 @@ unsigned short pack_short_tex(float c) { return c * USHRT_MAX; }
uint32_t pack_int10_n2(float *norm)
{
/*float x = norm[0];
float y = norm[1];
float z = norm[2];
const uint32_t xs = x < 0;
const uint32_t ys = y < 0;
const uint32_t zs = z < 0;
uint32_t vi =
zs << 29 | ((uint32_t)(z * 511 + (zs << 9)) & 511) << 20 |
ys << 19 | ((uint32_t)(y * 511 + (ys << 9)) & 511) << 10 |
xs << 9 | ((uint32_t)(x * 511 + (xs << 9)) & 511);
return vi;
int16_t ni[3];
printf("accessing norm %g,%g,%g\n", norm[0], norm[1], norm[2]);
for (int i = 0; i < 3; i++)
ni[i] = (int16_t)(norm[i]*512.0f);
uint32_t combined = (((uint32_t)ni[2]) << 20) | (((uint32_t)ni[1]) << 10) | ((uint32_t)ni[0]);
return combined;
uint32_t ni[3];
uint32_t ret = 0;
for (int i = 0; i < 3; i++) {
ni[i] = fabs(norm[i]) * 511.0 + 0.5;
ni[i] = (ni[i] > 511) ? 511 : ni[i];
ni[i] = ( norm[i] < 0.0 ) ? -ni[i] : ni[i];
int n = (norm[i]+1.0)*511;
ret |= (n & 0x3ff) << (10*i);
}
return ret;
}
return (ni[0] | ( (ni[1]) << 10) | ( (ni[2] << 20) | ( (0 & 0x3) << 30)));*/
// Pack the floats into a 32-bit unsigned integer
uint32_t packedValue = 0;
packedValue |= (uint32_t)((int32_t)(norm[0] * 0x1ff) & 0x3ff) << 20;
packedValue |= (uint32_t)((int32_t)(norm[1] * 0x1ff) & 0x3ff) << 10;
packedValue |= (uint32_t)((int32_t)(norm[2] * 0x1ff) & 0x3ff);
//packedValue |= (uint32_t)((int32_t)(0 * 0x1ff) & 0x3ff) >> 8;
return packedValue;
}
void mesh_add_material(mesh *mesh, cgltf_material *mat)
void mesh_add_material(primitive *prim, cgltf_material *mat)
{
if (!mat) return;
if (mat && mat->has_pbr_metallic_roughness) {
if (mat->has_pbr_metallic_roughness) {
cgltf_image *img = mat->pbr_metallic_roughness.base_color_texture.texture->image;
if (img->buffer_view) {
cgltf_buffer_view *buf = img->buffer_view;
mesh->bind.fs.images[0] = texture_fromdata(buf->buffer->data, buf->size)->id;
prim->bind.fs.images[0] = texture_fromdata(buf->buffer->data, buf->size)->id;
} else
mesh->bind.fs.images[0] = texture_from_file(img->uri)->id;
prim->bind.fs.images[0] = texture_from_file(img->uri)->id;
} else
mesh->bind.fs.images[0] = texture_from_file("icons/moon.gif")->id;
prim->bind.fs.images[0] = texture_from_file("icons/moon.gif")->id;
mesh->bind.fs.samplers[0] = std_sampler;
prim->bind.fs.samplers[0] = std_sampler;
}
sg_buffer texcoord_floats(float *f, int verts, int comp)
@ -160,10 +137,6 @@ sg_buffer texcoord_floats(float *f, int verts, int comp)
sg_buffer normal_floats(float *f, int verts, int comp)
{
return sg_make_buffer(&(sg_buffer_desc){
.data.ptr = f,
.data.size = sizeof(*f)*verts*comp
});
uint32_t packed_norms[verts];
for (int v = 0, i = 0; v < verts; v++, i+= comp)
packed_norms[v] = pack_int10_n2(f+i);
@ -174,46 +147,70 @@ sg_buffer normal_floats(float *f, int verts, int comp)
});
}
sg_buffer joint_buf(float *f, int v, int c)
{
char joints[v*c];
for (int i = 0; i < (v*c); i++)
joints[i] = f[i];
return sg_make_buffer(&(sg_buffer_desc){ .data = SG_RANGE(joints)});
}
sg_buffer weight_buf(float *f, int v, int c)
{
unsigned char weights[v*c];
for (int i = 0; i < (v*c); i++)
weights[i] = f[i]*255;
return sg_make_buffer(&(sg_buffer_desc){ .data = SG_RANGE(weights)});
}
HMM_Vec3 index_to_vert(uint32_t idx, float *f)
{
return (HMM_Vec3){f[idx*3], f[idx*3+1], f[idx*3+2]};
}
void mesh_add_primitive(mesh *mesh, cgltf_primitive *prim)
struct primitive mesh_add_primitive(cgltf_primitive *prim)
{
primitive retp = (primitive){0};
uint16_t *idxs;
if (prim->indices) {
int c = prim->indices->count;
idxs = malloc(sizeof(*idxs)*c);
memcpy(idxs, cgltf_buffer_view_data(prim->indices->buffer_view), sizeof(uint16_t) * c);
int n = cgltf_accessor_unpack_floats(prim->indices, NULL, 0);
float fidx[n];
cgltf_accessor_unpack_floats(prim->indices, fidx, n);
idxs = malloc(sizeof(*idxs)*n);
for (int i = 0; i < n; i++)
idxs[i] = fidx[i];
mesh->bind.index_buffer = sg_make_buffer(&(sg_buffer_desc){
retp.bind.index_buffer = sg_make_buffer(&(sg_buffer_desc){
.data.ptr = idxs,
.data.size = sizeof(uint16_t) * c,
.data.size = sizeof(*idxs) * n,
.type = SG_BUFFERTYPE_INDEXBUFFER,
.label = "mesh index buffer",
});
mesh->idx_count = c;
retp.idx_count = n;
} else {
YughWarn("Model does not have indices. Generating them.");
int c = prim->attributes[0].data->count;
int c = cgltf_accessor_unpack_floats(prim->attributes[0].data, NULL, 0);
mesh->idx_count = c;
retp.idx_count = c;
idxs = malloc(sizeof(*idxs)*c);
for (int z = 0; z < c; z++)
idxs[z] = z;
mesh->bind.index_buffer = sg_make_buffer(&(sg_buffer_desc){
retp.bind.index_buffer = sg_make_buffer(&(sg_buffer_desc){
.data.ptr = idxs,
.data.size = sizeof(uint16_t) * c,
.type = SG_BUFFERTYPE_INDEXBUFFER});
}
free(idxs);
printf("adding material\n");
mesh_add_material(mesh, prim->material);
mesh_add_material(&retp, prim->material);
int has_norm = 0;
for (int k = 0; k < prim->attributes_count; k++) {
@ -227,7 +224,7 @@ void mesh_add_primitive(mesh *mesh, cgltf_primitive *prim)
switch (attribute.type) {
case cgltf_attribute_type_position:
mesh->bind.vertex_buffers[0] = sg_make_buffer(&(sg_buffer_desc){
retp.bind.vertex_buffers[0] = sg_make_buffer(&(sg_buffer_desc){
.data.ptr = vs,
.data.size = sizeof(float) * n,
.label = "mesh vert buffer"
@ -236,8 +233,7 @@ void mesh_add_primitive(mesh *mesh, cgltf_primitive *prim)
case cgltf_attribute_type_normal:
has_norm = 1;
YughInfo("Found normals.");
mesh->bind.vertex_buffers[2] = normal_floats(vs, verts, comp);
retp.bind.vertex_buffers[2] = normal_floats(vs, verts, comp);
break;
case cgltf_attribute_type_tangent:
@ -247,16 +243,15 @@ void mesh_add_primitive(mesh *mesh, cgltf_primitive *prim)
break;
case cgltf_attribute_type_weights:
retp.bind.vertex_buffers[3] = weight_buf(vs, verts, comp);
break;
case cgltf_attribute_type_joints:
retp.bind.vertex_buffers[4] = joint_buf(vs, verts, comp);
break;
case cgltf_attribute_type_texcoord:
mesh->bind.vertex_buffers[1] = texcoord_floats(vs, verts, comp); /*sg_make_buffer(&(sg_buffer_desc){
.data.ptr = vs,
.data.size=sizeof(*vs)*verts*comp
});*/
retp.bind.vertex_buffers[1] = texcoord_floats(vs, verts, comp);
break;
case cgltf_attribute_type_invalid:
YughWarn("Invalid type.");
@ -288,48 +283,135 @@ void mesh_add_primitive(mesh *mesh, cgltf_primitive *prim)
face_norms[i] = face_norms[i+1] = face_norms[i+2] = packed_norm;
}
mesh->bind.vertex_buffers[2] = sg_make_buffer(&(sg_buffer_desc){
retp.bind.vertex_buffers[2] = sg_make_buffer(&(sg_buffer_desc){
.data.ptr = face_norms,
.data.size = sizeof(uint32_t) * verts});
}
return retp;
}
void model_add_cgltf_mesh(model *model, cgltf_mesh *gltf_mesh)
static cgltf_data *cdata;
void model_add_cgltf_mesh(mesh *m, cgltf_mesh *gltf_mesh)
{
mesh mesh = {0};
printf("mesh has %d primitives\n", gltf_mesh->primitives_count);
for (int i = 0; i < gltf_mesh->primitives_count; i++)
mesh_add_primitive(&mesh, &gltf_mesh->primitives[i]);
arrput(m->primitives, mesh_add_primitive(gltf_mesh->primitives+i));
}
arrput(model->meshes,mesh);
void packFloats(float *src, float *dest, int srcLength) {
int i, j;
for (i = 0, j = 0; i < srcLength; i += 3, j += 4) {
dest[j] = src[i];
dest[j + 1] = src[i + 1];
dest[j + 2] = src[i + 2];
dest[j + 3] = 0.0f;
}
}
void model_add_cgltf_anim(model *model, cgltf_animation *anim)
{
YughInfo("FOUND ANIM, using %d channels and %d samplers", anim->channels_count, anim->samplers_count);
struct animation an = (struct animation){0};
arrsetlen(an.samplers, anim->samplers_count);
for (int i = 0; i < anim->samplers_count; i++) {
cgltf_animation_sampler s = anim->samplers[i];
sampler samp = (sampler){0};
int n = cgltf_accessor_unpack_floats(s.input, NULL, 0);
arrsetlen(samp.times, n);
cgltf_accessor_unpack_floats(s.input, samp.times, n);
n = cgltf_accessor_unpack_floats(s.output, NULL, 0);
int comp = cgltf_num_components(s.output->type);
arrsetlen(samp.data, n/comp);
if (comp == 4)
cgltf_accessor_unpack_floats(s.output, samp.data, n);
else {
float *out = malloc(sizeof(*out)*n);
cgltf_accessor_unpack_floats(s.output, out, n);
packFloats(out, samp.data, n);
free(out);
}
samp.type = s.interpolation;
if (samp.type == LINEAR && comp == 4)
samp.type = SLERP;
an.samplers[i] = samp;
}
for (int i = 0; i < anim->channels_count; i++) {
cgltf_animation_channel ch = anim->channels[i];
struct anim_channel ach = (struct anim_channel){0};
md5joint *md = model->nodes+(ch.target_node-cdata->nodes);
switch(ch.target_path) {
case cgltf_animation_path_type_translation:
ach.target = &md->pos;
break;
case cgltf_animation_path_type_rotation:
ach.target = &md->rot;
break;
case cgltf_animation_path_type_scale:
ach.target = &md->scale;
break;
}
ach.sampler = an.samplers+(ch.sampler-anim->samplers);
arrput(an.channels, ach);
}
model->anim = an;
model->anim.time = apptime();
}
void model_add_cgltf_skin(model *model, cgltf_skin *skin)
{
int n = cgltf_accessor_unpack_floats(skin->inverse_bind_matrices, NULL, 0);
struct skin sk = (struct skin){0};
arrsetlen(sk.invbind, n/16);
cgltf_accessor_unpack_floats(skin->inverse_bind_matrices, sk.invbind, n);
YughInfo("FOUND SKIN, of %d bones, and %d vert comps", skin->joints_count, n);
cgltf_node *root = skin->skeleton;
arrsetlen(sk.joints, skin->joints_count);
sk.root = model->nodes+(skin->skeleton-cdata->nodes);
for (int i = 0; i < 50; i++)
sk.binds[i] = HMM_M4D(1);
for (int i = 0; i < skin->joints_count; i++) {
int offset = skin->joints[i]-cdata->nodes;
sk.joints[i] = model->nodes+offset;
md5joint *j = sk.joints[i];
cgltf_node *n = skin->joints[i];
for (int i = 0; i < 3; i++) {
j->pos.e[i] = n->translation[i];
j->scale.e[i] = n->scale[i];
}
for (int i = 0; i < 4; i++)
j->rot.e[i] = n->rotation[i];
}
model->skin = sk;
}
void model_process_node(model *model, cgltf_node *node)
{
if (node->has_matrix)
memcpy(model->matrix.Elements, node->matrix, sizeof(float)*16);
int n = node-cdata->nodes;
cgltf_node_transform_world(node, model->nodes[n].t.e);
model->nodes[n].parent = model->nodes+(node->parent-cdata->nodes);
if (node->mesh)
model_add_cgltf_mesh(model, node->mesh);
if (node->skin)
model_add_cgltf_skin(model, node->skin);
if (node->mesh) {
int meshn = node->mesh-cdata->meshes;
arrsetlen(model->meshes, meshn+1);
model->meshes[meshn].m = &model->nodes[n].t;
model_add_cgltf_mesh(model->meshes+meshn, node->mesh);
}
void model_process_scene(model *model, cgltf_scene *scene)
{
for (int i = 0; i < scene->nodes_count; i++)
model_process_node(model, scene->nodes[i]);
}
struct model *model_make(const char *path)
@ -338,30 +420,36 @@ struct model *model_make(const char *path)
cgltf_options options = {0};
cgltf_data *data = NULL;
cgltf_result result = cgltf_parse_file(&options, path, &data);
struct model *model = NULL;
if (result) {
YughError("CGLTF could not parse file %s, err %d.", path, result);
return NULL;
goto CLEAN;
}
result = cgltf_load_buffers(&options, data, path);
if (result) {
YughError("CGLTF could not load buffers for file %s, err %d.", path, result);
return NULL;
goto CLEAN;
}
struct model *model = calloc(1, sizeof(*model));
cdata = data;
if (data->scenes_count == 0 || data->scenes_count > 1) return NULL;
model_process_scene(model, data->scene);
model = calloc(1, sizeof(*model));
for (int i = 0; i < data->meshes_count; i++)
model_add_cgltf_mesh(model, &data->meshes[i]);
arrsetlen(model->nodes, data->nodes_count);
for (int i = 0; i < data->nodes_count; i++)
model_process_node(model, data->nodes+i);
for (int i = 0; i < data->animations_count; i++)
model_add_cgltf_anim(model, &data->animations[i]);
model_add_cgltf_anim(model, data->animations+i);
for (int i = 0; i < data->skins_count; i++)
model_add_cgltf_skin(model, data->skins+i);
CLEAN:
cgltf_free(data);
return model;
}
@ -372,20 +460,45 @@ void model_free(model *m)
void model_draw_go(model *model, gameobject *go, gameobject *cam)
{
animation_run(&model->anim, apptime());
skin *sk = &model->skin;
for (int i = 0; i < arrlen(sk->joints); i++) {
md5joint *md = sk->joints[i];
HMM_Mat4 local = HMM_M4TRS(md->pos.xyz, md->rot, md->scale.xyz);
if (md->parent)
local = HMM_MulM4(md->parent->t, local);
md->t = local;
sk->binds[i] = HMM_MulM4(md->t, sk->invbind[i]);
//printf("TRANSLATION OF %d IS " HMMFMT_VEC3 "\n", i, HMMPRINT_VEC3(md->pos));
}
HMM_Mat4 view = t3d_go2world(cam);
HMM_Mat4 proj = HMM_Perspective_RH_NO(20, 1, 0.01, 10000);
HMM_Mat4 vp = HMM_MulM4(proj, view);
vs_p_t vs_p;
memcpy(vs_p.vp, vp.Elements, sizeof(float)*16);
memcpy(vs_p.model, t3d_go2world(go).Elements, sizeof(float)*16);
HMM_Mat4 gom = transform3d2mat(go2t3(go));
sg_apply_pipeline(model_pipe);
sg_apply_uniforms(SG_SHADERSTAGE_VS, SLOT_vs_p, SG_RANGE_REF(vs_p));
sg_apply_uniforms(SG_SHADERSTAGE_VS, SLOT_vs_p, SG_RANGE_REF(vp.e));
sg_apply_uniforms(SG_SHADERSTAGE_VS, SLOT_skinv, &(sg_range){
.ptr = sk->binds,
.size = sizeof(*sk->binds)*50
});
float ambient[4] = {1.0,1.0,1.0,1.0};
sg_apply_uniforms(SG_SHADERSTAGE_FS, SLOT_lightf, SG_RANGE_REF(ambient));
for (int i = 0; i < arrlen(model->meshes); i++) {
sg_apply_bindings(&model->meshes[i].bind);
sg_draw(0, model->meshes[i].idx_count, 1);
HMM_Mat4 mod = *model->meshes[i].m;
mod = HMM_MulM4(mod, gom);
mesh msh = model->meshes[i];
for (int j = 0; j < arrlen(msh.primitives); j++) {
sg_apply_bindings(&(msh.primitives[j].bind));
sg_apply_uniforms(SG_SHADERSTAGE_VS, SLOT_vmodel, &(sg_range){
.ptr = mod.em,
.size = sizeof(mod)
});
sg_draw(0, model->meshes[i].primitives[j].idx_count, 1);
}
}
}

51
source/engine/3d/model.h
View file

@ -5,32 +5,65 @@
#include "transform.h"
#include "sokol/sokol_gfx.h"
#include "gameobject.h"
#include "anim.h"
#include "texture.h"
extern HMM_Vec3 eye;
typedef struct material {
texture *diffuse;
texture *metalrough;
float metal;
float rough;
texture *normal;
float nrm;
texture *occlusion;
float occl;
texture *emissive;
HMM_Vec3 emis;
} material;
struct model;
typedef struct primitive {
sg_bindings bind;
uint32_t idx_count;
} primitive;
/* A single mesh */
typedef struct mesh {
sg_bindings bind; /* Encapsulates material, norms, etc */
uint32_t idx_count;
primitive *primitives;
HMM_Mat4 *m;
} mesh;
typedef struct joint {
int me;
struct joint *children;
} joint_t;
typedef struct md5joint {
struct md5joint *parent;
HMM_Vec4 pos;
HMM_Quat rot;
HMM_Vec4 scale;
HMM_Mat4 t;
} md5joint;
typedef struct skin {
md5joint **joints;
HMM_Mat4 *invbind;
HMM_Mat4 binds[50]; /* binds = joint * invbind */
md5joint *root;
} skin;
/* A collection of meshes which create a full figure */
typedef struct model {
struct mesh *meshes;
HMM_Mat4 matrix;
md5joint *nodes;
skin skin;
struct animation anim;
} model;
typedef struct bone {
transform3d t;
struct bone *children;
} bone;
/* Make a Model struct */
struct model *model_make(const char *path);
void model_free(model *m);

62
source/engine/HandmadeMath.h
View file

@ -189,6 +189,12 @@
#define HMM_MOD(a, m) (((a) % (m)) >= 0 ? ((a) % (m)) : (((a) % (m)) + (m)))
#define HMM_SQUARE(x) ((x) * (x))
#define HMMFMT_VEC3 "[%g,%g,%g]"
#define HMMPRINT_VEC3(vec) vec.x, vec.y, vec.z
#define FMT_VEC4 "[%g,%g,%g,%g]"
#define PRINT_VEC4(vec) vec.x, vec.y, vec.z, vec.w
typedef union HMM_Vec2 {
struct
{
@ -292,7 +298,10 @@ typedef union HMM_Quat {
float W;
};
struct {float x, y, z, w;};
float Elements[4];
float e[4];
#ifdef HANDMADE_MATH__USE_SSE
__m128 SSE;
@ -366,6 +375,7 @@ typedef union HMM_Vec4 {
};
HMM_Quat quat;
struct {float x, y, z, w; };
float Elements[4];
float e[4];
@ -376,6 +386,8 @@ typedef union HMM_Vec4 {
} HMM_Vec4;
static const HMM_Vec4 v4zero = {0,0,0,0};
typedef union HMM_Mat2 {
float Elements[2][2];
HMM_Vec2 Columns[2];
@ -392,7 +404,7 @@ typedef union HMM_Mat4 {
float Elements[4][4];
HMM_Vec4 Columns[4];
float e[4][4];
float em[16];
} HMM_Mat4;
@ -1709,14 +1721,6 @@ static inline HMM_Mat4 HMM_Translate(HMM_Vec3 Translation) {
return Result;
}
static inline HMM_Mat4 *HMM_Translate_p(HMM_Mat4 *m, HMM_Vec3 t)
{
m->Elements[3][0] += t.X;
m->Elements[3][1] += t.Y;
m->Elements[3][2] += t.Z;
return m;
}
static inline HMM_Mat4 HMM_InvTranslate(HMM_Mat4 TranslationMatrix) {
HMM_Mat4 Result = TranslationMatrix;
@ -1771,14 +1775,6 @@ static inline HMM_Mat4 HMM_Scale(HMM_Vec3 Scale) {
return Result;
}
static inline HMM_Mat4 *HMM_Scale_p(HMM_Mat4 *m, HMM_Vec3 s)
{
m->Elements[0][0] *= s.X;
m->Elements[1][1] *= s.Y;
m->Elements[2][2] *= s.Z;
return m;
}
static inline HMM_Mat4 HMM_InvScale(HMM_Mat4 ScaleMatrix) {
HMM_Mat4 Result = ScaleMatrix;
@ -2148,6 +2144,38 @@ static inline HMM_Mat4 HMM_QToM4(HMM_Quat Left) {
return Result;
}
static inline HMM_Mat4 HMM_M4TRS(HMM_Vec3 t, HMM_Quat q, HMM_Vec3 s)
{
HMM_Mat4 T = HMM_Translate(t);
HMM_Mat4 R = HMM_QToM4(q);
HMM_Mat4 S = HMM_Scale(s);
HMM_Mat4 l;
float *lm = (float*)&l;
lm[0] = (1 - 2 * q.y*q.y - 2 * q.z*q.z) * s.x;
lm[1] = (2 * q.x*q.y + 2 * q.z*q.w) * s.x;
lm[2] = (2 * q.x*q.z - 2 * q.y*q.w) * s.x;
lm[3] = 0.f;
lm[4] = (2 * q.x*q.y - 2 * q.z*q.w) * s.y;
lm[5] = (1 - 2 * q.x*q.x - 2 * q.z*q.z) * s.y;
lm[6] = (2 * q.y*q.z + 2 * q.x*q.w) * s.y;
lm[7] = 0.f;
lm[8] = (2 * q.x*q.z + 2 * q.y*q.w) * s.z;
lm[9] = (2 * q.y*q.z - 2 * q.x*q.w) * s.z;
lm[10] = (1 - 2 * q.x*q.x - 2 * q.y*q.y) * s.z;
lm[11] = 0.f;
lm[12] = t.x;
lm[13] = t.y;
lm[14] = t.z;
lm[15] = 1.f;
return l;
}
// This method taken from Mike Day at Insomniac Games.
// https://d3cw3dd2w32x2b.cloudfront.net/wp-content/uploads/2015/01/matrix-to-quat.pdf
//

29
source/engine/anim.c
View file

@ -2,36 +2,35 @@
#include "log.h"
#include "stb_ds.h"
void sampler_add(sampler *s, float time, HMM_Vec4 val)
void animation_run(struct animation *anim, float now)
{
arrput(s->times,time);
arrput(s->data,val);
float elapsed = now - anim->time;
elapsed = fmod(elapsed,2);
if (!anim->channels) return;
for (int i = 0; i < arrlen(anim->channels); i++) {
struct anim_channel *ch = anim->channels+i;
HMM_Vec4 s = sample_sampler(ch->sampler, elapsed);
*(ch->target) = s;
}
}
HMM_Vec4 sample_cubicspline(sampler *sampler, float t, int prev, int next)
{
float t2 = t*t;
float t3 = t2*t;
float td = sampler->times[next]-sampler->times[prev];
HMM_Vec4 v = HMM_MulV4F(sampler->data[prev*3+1], (2*t3-3*t2+1));
v = HMM_AddV4(v, HMM_MulV4F(sampler->data[prev*3+2], td*(t3-2*t2+t)));
v = HMM_AddV4(v, HMM_MulV4F(sampler->data[next*3+1], 3*t2-2*t3));
v = HMM_AddV4(v, HMM_MulV4F(sampler->data[next*3], td*(t3-t2)));
return v;
return (HMM_Vec4)HMM_SLerp(HMM_QV4(sampler->data[prev]), t, HMM_QV4(sampler->data[next]));
}
HMM_Vec4 sample_sampler(sampler *sampler, float time)
{
if (arrlen(sampler->data) == 0) return (HMM_Vec4){0,0,0,0};
if (arrlen(sampler->data) == 0) return v4zero;
if (arrlen(sampler->data) == 1) return sampler->data[0];
int previous_time=0;
int next_time=0;
for (int i = 1; i < arrlen(sampler->times); i++) {
if (time < sampler->times[i]) {
previous_time = sampler->times[i-1];
next_time = sampler->times[i];
previous_time = i-1;
next_time = i;
break;
}
}

12
source/engine/anim.h
View file

@ -13,12 +13,6 @@ struct keyframe {
#define CUBICSPLINE 2
#define SLERP 3
typedef struct samplerf {
float *times;
float *data;
int type;
} samplerf;
typedef struct sampler {
float *times;
HMM_Vec4 *data;
@ -26,6 +20,8 @@ typedef struct sampler {
} sampler;
struct anim_channel {
HMM_Vec4 *target;
int comps;
sampler *sampler;
};
@ -33,10 +29,10 @@ struct animation {
char *name;
double time;
struct anim_channel *channels;
sampler *samplers;
};
void sampler_add(sampler *s, float time, HMM_Vec4 val);
void animation_run(struct animation *anim, float now);
HMM_Vec4 sample_sampler(sampler *sampler, float time);
#endif

3
source/engine/config.c
View file

@ -41,3 +41,6 @@
#define NANOSVGRAST_IMPLEMENTATION
#include "nanosvg.h"
#include "nanosvgrast.h"
#define CGLTF_IMPLEMENTATION
#include "cgltf.h"

2
source/engine/particle.c
View file

@ -92,7 +92,7 @@ emitter *make_emitter() {
e->life = 10;
e->tte = lerp(e->explosiveness, e->life/e->max, 0);
sampler_add(&e->color, 0, (HMM_Vec4){1,1,1,1});
//sampler_add(&e->color, 0, (HMM_Vec4){1,1,1,1});
e->scale = 1;
e->speed = 20;
e->texture = NULL;

6
source/engine/transform.c
View file

@ -58,7 +58,11 @@ transform2d mat2transform2d(HMM_Mat3 m)
return t;
}
HMM_Mat4 transform3d2mat(transform3d t) { return HMM_MulM4(HMM_Translate(t.pos), HMM_MulM4(HMM_QToM4(t.rotation), HMM_Scale(t.scale))); }
HMM_Mat4 transform3d2mat(transform3d t) {
return HMM_MulM4(HMM_Translate(t.pos),
HMM_MulM4(HMM_QToM4(t.rotation),
HMM_Scale(t.scale)));
}
transform3d mat2transform3d(HMM_Mat4 m)
{

2
source/shaders/sprite.sglsl
View file

@ -47,8 +47,6 @@ void main()
color = texture(sampler2D(image,smp), texcoords);
color *= fcolor;
color.xyz = mix(color.xyz, femissive.xyz, femissive.a);
color.a = 1.0;
}
@end

25
source/shaders/unlit.sglsl
View file

@ -2,19 +2,26 @@
in vec3 a_pos;
in vec2 a_tex_coords;
in vec4 a_norm;
in vec4 a_weight;
in vec4 a_joint;
out vec2 tex_coords;
out vec3 normal;
uniform vs_p {
uniform mat4 vp;
uniform mat4 model;
};
uniform vs_p { uniform mat4 vp; };
uniform vmodel { uniform mat4 model; };
uniform skinv { uniform mat4 bones[50]; };
void main() {
gl_Position = vp * model * vec4(a_pos,1.0);
mat4 skin = bones[int(a_joint.x)] * a_weight.x;
skin += bones[int(a_joint.y)] * a_weight.y;
skin += bones[int(a_joint.z)] * a_weight.z;
skin += bones[int(a_joint.w)] * a_weight.w;
mat4 skinm = model * skin;
gl_Position = vp * skinm * vec4(a_pos,1.0);
tex_coords = a_tex_coords;
normal = a_norm.xyz;
normal = (skinm * vec4(a_norm.xyz*2-1,0)).xyz;
}
@end
@ -26,10 +33,14 @@ out vec4 color;
uniform texture2D diffuse;
uniform sampler smp;
uniform lightf {
vec4 ambient;
};
void main() {
vec3 lightDir = normalize(vec3(0.5f, 0.5f, 1.0f));
float diff = max(dot(normal, lightDir), 0.0f);
color = texture(sampler2D(diffuse,smp),tex_coords)*diff;
color = texture(sampler2D(diffuse,smp),tex_coords) * ambient;
}
@end