/* don't set windows active in here, is used by renderwin too */
void setviewmatrixview3d(Scene *scene, View3D *v3d, RegionView3D *rv3d)
{
if (rv3d->persp == RV3D_CAMOB) { /* obs/camera */
if (v3d->camera) {
BKE_object_where_is_calc(scene, v3d->camera);
obmat_to_viewmat(v3d, rv3d, v3d->camera, 0);
}
else {
quat_to_mat4(rv3d->viewmat, rv3d->viewquat);
rv3d->viewmat[3][2] -= rv3d->dist;
}
}
else {
/* should be moved to better initialize later on XXX */
if (rv3d->viewlock)
ED_view3d_lock(rv3d);
quat_to_mat4(rv3d->viewmat, rv3d->viewquat);
if (rv3d->persp == RV3D_PERSP) rv3d->viewmat[3][2] -= rv3d->dist;
if (v3d->ob_centre) {
Object *ob = v3d->ob_centre;
float vec[3];
copy_v3_v3(vec, ob->obmat[3]);
if (ob->type == OB_ARMATURE && v3d->ob_centre_bone[0]) {
bPoseChannel *pchan = BKE_pose_channel_find_name(ob->pose, v3d->ob_centre_bone);
if (pchan) {
copy_v3_v3(vec, pchan->pose_mat[3]);
mul_m4_v3(ob->obmat, vec);
}
}
translate_m4(rv3d->viewmat, -vec[0], -vec[1], -vec[2]);
}
else if (v3d->ob_centre_cursor) {
float vec[3];
copy_v3_v3(vec, give_cursor(scene, v3d));
translate_m4(rv3d->viewmat, -vec[0], -vec[1], -vec[2]);
}
else {
translate_m4(rv3d->viewmat, rv3d->ofs[0], rv3d->ofs[1], rv3d->ofs[2]);
}
}
}
/* draw a 3D stroke in "volumetric" style */
static void gp_draw_stroke_volumetric_3d(bGPDspoint *points, int totpoints, short thickness,
short UNUSED(dflag), short UNUSED(sflag))
{
GLUquadricObj *qobj = gluNewQuadric();
float base_modelview[4][4], modelview[4][4];
float base_loc[3];
bGPDspoint *pt;
int i;
/* Get the basic modelview matrix we use for performing calculations */
glGetFloatv(GL_MODELVIEW_MATRIX, (float *)base_modelview);
copy_v3_v3(base_loc, base_modelview[3]);
/* Create the basic view-aligned billboard matrix we're going to actually draw qobj with:
* - We need to knock out the rotation so that we are
* simply left with a camera-facing billboard
* - The scale factors here are chosen so that the thickness
* is relatively reasonable. Otherwise, it gets far too
* large!
*/
scale_m4_fl(modelview, 0.1f);
/* draw each point as a disk... */
glPushMatrix();
for (i = 0, pt = points; i < totpoints && pt; i++, pt++) {
/* apply translation to base_modelview, so that the translated point is put in the right place */
translate_m4(base_modelview, pt->x, pt->y, pt->z);
/* copy the translation component to the billboard matrix we're going to use,
* then reset the base matrix to the original values so that we can do the same
* for the next point without accumulation/pollution effects
*/
copy_v3_v3(modelview[3], base_modelview[3]); /* copy offset value */
copy_v3_v3(base_modelview[3], base_loc); /* restore */
/* apply our billboard matrix for drawing... */
glLoadMatrixf((float *)modelview);
/* draw the disk using the current state... */
gluDisk(qobj, 0.0, pt->pressure * thickness, 32, 1);
}
glPopMatrix();
gluDeleteQuadric(qobj);
}
/* draw a 2D strokes in "volumetric" style */
static void gp_draw_stroke_volumetric_2d(bGPDspoint *points, int totpoints, short thickness,
short dflag, short sflag,
int offsx, int offsy, int winx, int winy)
{
GLUquadricObj *qobj = gluNewQuadric();
float modelview[4][4];
float baseloc[3];
float scalefac = 1.0f;
bGPDspoint *pt;
int i;
/* HACK: We need a scale factor for the drawing in the image editor,
* which seems to use 1 unit as it's maximum size, whereas everything
* else assumes 1 unit = 1 pixel. Otherwise, we only get a massive blob.
*/
if ((dflag & GP_DRAWDATA_IEDITHACK) && (dflag & GP_DRAWDATA_ONLYV2D)) {
scalefac = 0.001f;
}
/* get basic matrix */
glGetFloatv(GL_MODELVIEW_MATRIX, (float *)modelview);
copy_v3_v3(baseloc, modelview[3]);
/* draw points */
glPushMatrix();
for (i = 0, pt = points; i < totpoints; i++, pt++) {
/* set the transformed position */
float co[2];
gp_calc_2d_stroke_xy(pt, sflag, offsx, offsy, winx, winy, co);
translate_m4(modelview, co[0], co[1], 0.0f);
glLoadMatrixf((float *)modelview);
/* draw the disk using the current state... */
gluDisk(qobj, 0.0, pt->pressure * thickness * scalefac, 32, 1);
/* restore matrix */
copy_v3_v3(modelview[3], baseloc);
}
glPopMatrix();
gluDeleteQuadric(qobj);
}
void renderChunk(Chunk *chunk) {
// free the previously used buffers. Memory leaks are bad, mmkay.
if (chunk->mesh)
freeMesh(chunk->mesh);
// 6 faces per cube * 2 triangles per face * 3 vertices per triangle * 3 coordinates per vertex
unsigned int max_points = countChunkSize(chunk);//6 * 6 * 3 * CHUNK_SIZE * CHUNK_SIZE * CHUNK_SIZE;
// don't render an empty chunk :p
if (max_points == 0) {
*chunk->mesh = EMPTY_MESH;
return;
}
GLfloat *points = malloc(max_points * sizeof(GLfloat));
GLfloat *normals = malloc(max_points * sizeof(GLfloat));
GLfloat *colors = malloc(max_points * sizeof(GLfloat));
int size;
if (useMeshing)
size = renderChunkWithMeshing(chunk, points, normals, colors, (vec3){0, 0, 0}, 1.0);
else
size = renderChunkToArrays(chunk, points, normals, colors, (vec3){0, 0, 0}, 1.0);
buildMesh(chunk->mesh, points, normals, colors, NULL, NULL,
size * sizeof(GLfloat), size * sizeof(GLfloat),
size * sizeof(GLfloat), 0, 0,
size / 3);
translate_m4(chunk->mesh->modelMatrix,
chunk->x * CHUNK_WIDTH,
chunk->y * CHUNK_WIDTH,
chunk->z * CHUNK_WIDTH);
free(points);
free(normals);
free(colors);
}
/* don't set windows active in here, is used by renderwin too */
void view3d_viewmatrix_set(Scene *scene, View3D *v3d, RegionView3D *rv3d)
{
if (rv3d->persp == RV3D_CAMOB) { /* obs/camera */
if (v3d->camera) {
BKE_object_where_is_calc(scene, v3d->camera);
obmat_to_viewmat(rv3d, v3d->camera);
}
else {
quat_to_mat4(rv3d->viewmat, rv3d->viewquat);
rv3d->viewmat[3][2] -= rv3d->dist;
}
}
else {
bool use_lock_ofs = false;
/* should be moved to better initialize later on XXX */
if (rv3d->viewlock & RV3D_LOCKED)
ED_view3d_lock(rv3d);
quat_to_mat4(rv3d->viewmat, rv3d->viewquat);
if (rv3d->persp == RV3D_PERSP) rv3d->viewmat[3][2] -= rv3d->dist;
if (v3d->ob_centre) {
Object *ob = v3d->ob_centre;
float vec[3];
copy_v3_v3(vec, ob->obmat[3]);
if (ob->type == OB_ARMATURE && v3d->ob_centre_bone[0]) {
bPoseChannel *pchan = BKE_pose_channel_find_name(ob->pose, v3d->ob_centre_bone);
if (pchan) {
copy_v3_v3(vec, pchan->pose_mat[3]);
mul_m4_v3(ob->obmat, vec);
}
}
translate_m4(rv3d->viewmat, -vec[0], -vec[1], -vec[2]);
use_lock_ofs = true;
}
else if (v3d->ob_centre_cursor) {
float vec[3];
copy_v3_v3(vec, ED_view3d_cursor3d_get(scene, v3d));
translate_m4(rv3d->viewmat, -vec[0], -vec[1], -vec[2]);
use_lock_ofs = true;
}
else {
translate_m4(rv3d->viewmat, rv3d->ofs[0], rv3d->ofs[1], rv3d->ofs[2]);
}
/* lock offset */
if (use_lock_ofs) {
float persmat[4][4], persinv[4][4];
float vec[3];
/* we could calculate the real persmat/persinv here
* but it would be unreliable so better to later */
mul_m4_m4m4(persmat, rv3d->winmat, rv3d->viewmat);
invert_m4_m4(persinv, persmat);
mul_v2_v2fl(vec, rv3d->ofs_lock, rv3d->is_persp ? rv3d->dist : 1.0f);
vec[2] = 0.0f;
mul_mat3_m4_v3(persinv, vec);
translate_m4(rv3d->viewmat, vec[0], vec[1], vec[2]);
}
/* end lock offset */
}
}
int main(void)
{
if(!glfwInit()) {
printf("Could not init GLFW");
getchar();
return -1;
}
glfwWindowHint(GLFW_SAMPLES, 4);
//Opengl 2.1
//glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 2);
//glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 1);
//Opengl 3.3
glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
glfwWindowHint(GLFW_OPENGL_FORWARD_COMPAT, GL_TRUE); // MacOS fix
glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
if(window_init(&window, 640, 480, "Test")) {
fprintf( stderr, "Failed to open window.\n" );
getchar();
glfwTerminate();
};
window_set_size_callback(&window, window_size_callback);
glewExperimental = GL_TRUE; // Needed for core profile
if (glewInit() != GLEW_OK) {
fprintf(stderr, "Failed to initialize GLEW\n");
getchar();
glfwTerminate();
return -1;
}
//#clear errors GLEW may trigger
printError();
glClearColor(0.0f, 0.0f, 0.4f, 0.0f);
GLuint VertexArrayID;
glGenVertexArrays(1, &VertexArrayID);
glBindVertexArray(VertexArrayID);
//Load model
//----------
Model cube;
model_init(&cube);
model_set_data_length(&cube, sizeof(cube_vertex_data));
model_set_vertices(&cube, cube_vertex_data);
model_set_colors(&cube, cube_color_data);
model_set_uv_map(&cube, cube_uv_data);
model_set_texture(&cube, "./textures/bricks.dds");
model_bind(&cube);
//Create shaders
//--------------
GLuint vertexShader, fragmentShader;
loadShader(&vertexShader, GL_VERTEX_SHADER, mvpVertexShaderSource);
loadShader(&fragmentShader, GL_FRAGMENT_SHADER, fragmentShaderSource);
//Create program
//--------------
GLuint program;
createProgram(&program, vertexShader, fragmentShader);
// Enable z-buffer
// ---------------
glEnable(GL_DEPTH_TEST);
glDepthFunc(GL_LESS);
// Enable culling
// --------------
glEnable(GL_CULL_FACE);
// Get MVP uniform
// ---------------
GLuint mvp_ul = glGetUniformLocation(program, "MVP");
// Model Matrix
// ------------
Mat4 s;
scale_m4(&s, 0.1f, 0.1f, 0.1f);
printf("Scale:\n");
print_m4(&s);
Mat4 r;
rotate_m4(&r, 0.0f, 1.0f, 0.0f, 0.0f);
printf("Rotate:\n");
print_m4(&r);
Mat4 t;
translate_m4(&t, 0.0f, 0.0f, 0.0f);
printf("Translate:\n");
print_m4(&t);
Mat4 rs;
printf("Rotated*Scaled:\n");
mul_m4(&rs, &r, &s);
print_m4(&rs);
Mat4 model;
printf("Model:\n");
mul_m4(&model, &t, &rs);
print_m4(&model);
// Camera
// ------
Vec3 pos;
Vec3 center;
Vec3 up;
Vec3 direction;
Vec3 right;
camera_init(&camera);
camera_set_fov(&camera, 1.0f);
camera_set_aspect(&camera, (float)window.width/(float)window.height);
Input input;
input_init(&input, &window, 0.5f, 0.5f, 0.8f, -5.7f, -2.7f);
do {
glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
glUseProgram(program);
input_get_data(&input, &pos, &direction, &right);
add_v3(¢er, &pos, &direction);
cross_v3(&up, &direction, &right);
camera_set_position(&camera, &pos);
camera_set_center(&camera, ¢er);
camera_set_up(&camera, &up);
// Mvp Matrix
// ----------
Mat4 vp;
camera_get_matrix(&camera, &vp);
Mat4 mvp;
mul_m4(&mvp, &vp, &model);
printf("Perspective:\n");
print_m4(&mvp);
// Set MVP transform
glUniformMatrix4fv(mvp_ul, 1, GL_TRUE, &mvp[0][0]);
model_render(&cube);
window_swap_buffers(&window);
glfwPollEvents();
} while(
glfwGetKey(window.handle, GLFW_KEY_ESCAPE ) != GLFW_PRESS &&
glfwWindowShouldClose(window.handle) == 0
);
// Dispose
// -------
model_dispose(&cube);
glDeleteVertexArrays(1, &VertexArrayID);
glDetachShader(program, fragmentShader);
glDetachShader(program, vertexShader);
glDeleteShader(fragmentShader);
glDeleteShader(vertexShader);
glDeleteProgram(program);
glfwTerminate();
return 0;
}
static void camera_stereo3d_model_matrix(Object *camera, const bool is_left, float r_modelmat[4][4])
{
Camera *data = (Camera *)camera->data;
float interocular_distance, convergence_distance;
short convergence_mode, pivot;
float sizemat[4][4];
float fac = 1.0f;
float fac_signed;
interocular_distance = data->stereo.interocular_distance;
convergence_distance = data->stereo.convergence_distance;
convergence_mode = data->stereo.convergence_mode;
pivot = data->stereo.pivot;
if (((pivot == CAM_S3D_PIVOT_LEFT) && is_left) ||
((pivot == CAM_S3D_PIVOT_RIGHT) && !is_left))
{
camera_model_matrix(camera, r_modelmat);
return;
}
else {
float size[3];
mat4_to_size(size, camera->obmat);
size_to_mat4(sizemat, size);
}
if (pivot == CAM_S3D_PIVOT_CENTER)
fac = 0.5f;
fac_signed = is_left ? fac : -fac;
/* rotation */
if (convergence_mode == CAM_S3D_TOE) {
float angle;
float angle_sin, angle_cos;
float toeinmat[4][4];
float rotmat[4][4];
unit_m4(rotmat);
if (pivot == CAM_S3D_PIVOT_CENTER) {
fac = -fac;
fac_signed = -fac_signed;
}
angle = atanf((interocular_distance * 0.5f) / convergence_distance) / fac;
angle_cos = cosf(angle * fac_signed);
angle_sin = sinf(angle * fac_signed);
rotmat[0][0] = angle_cos;
rotmat[2][0] = -angle_sin;
rotmat[0][2] = angle_sin;
rotmat[2][2] = angle_cos;
if (pivot == CAM_S3D_PIVOT_CENTER) {
/* set the rotation */
copy_m4_m4(toeinmat, rotmat);
/* set the translation */
toeinmat[3][0] = interocular_distance * fac_signed;
/* transform */
normalize_m4_m4(r_modelmat, camera->obmat);
mul_m4_m4m4(r_modelmat, r_modelmat, toeinmat);
/* scale back to the original size */
mul_m4_m4m4(r_modelmat, r_modelmat, sizemat);
}
else { /* CAM_S3D_PIVOT_LEFT, CAM_S3D_PIVOT_RIGHT */
/* rotate perpendicular to the interocular line */
normalize_m4_m4(r_modelmat, camera->obmat);
mul_m4_m4m4(r_modelmat, r_modelmat, rotmat);
/* translate along the interocular line */
unit_m4(toeinmat);
toeinmat[3][0] = -interocular_distance * fac_signed;
mul_m4_m4m4(r_modelmat, r_modelmat, toeinmat);
/* rotate to toe-in angle */
mul_m4_m4m4(r_modelmat, r_modelmat, rotmat);
/* scale back to the original size */
mul_m4_m4m4(r_modelmat, r_modelmat, sizemat);
}
}
else {
normalize_m4_m4(r_modelmat, camera->obmat);
/* translate - no rotation in CAM_S3D_OFFAXIS, CAM_S3D_PARALLEL */
translate_m4(r_modelmat, -interocular_distance * fac_signed, 0.0f, 0.0f);
/* scale back to the original size */
mul_m4_m4m4(r_modelmat, r_modelmat, sizemat);
}
}
