// TODO: alot of slow stuff in it
b32 cameraIsPointInFrustum(Camera *cam, Vec3 worldPos)
{
Plane frustumPlanes[6];
getFrustumPlanes(&cam->perspectiveMatrix, frustumPlanes);
for(int i = 0; i < 6; i++)
{
Vec4 thing = vec4(frustumPlanes[i].a,frustumPlanes[i].b,frustumPlanes[i].c,0.0f);
Mat4 mat = cameraCalculateInverseViewMatrix(cam);
Vec4 res;
mat4Vec4Mul(&res, &mat, &thing);
frustumPlanes[i] = planeFromVec4(&res);
}
Vec3 n[6];
r32 d[6];
for(int planeId = 0; planeId < 6; planeId++)
{
Vec3 idk = vec3(frustumPlanes[planeId].a,frustumPlanes[planeId].b,frustumPlanes[planeId].c);
n[planeId] = vec3Normalized(&idk);
d[planeId] = frustumPlanes[planeId].d;
}
// TODO: check for all 6 planes?
Vec3 pos;
vec3Sub(&pos, &worldPos, &cam->position);
r32 res = vec3Dot(&pos, &n[0]) + d[0] + 141.0f;
r32 res2 = vec3Dot(&pos, &n[1]) + d[1] + 141.0f;
if(res <= 0.f || res2 <= 0.f)
return false;
return true;
}
Vec3 cameraCalculateRightDirection(Camera* camera)
{
Quaternion q = quaternion(camera->rotation.w,camera->rotation.x,camera->rotation.y,camera->rotation.z);
Mat4 m;
mat4FromQuaternion(&m, &q);
Vec4 dir = vec4(1.f,0.f,0.f,0.f);
Vec4 res;
mat4Vec4Mul(&res, &m, &dir);
Vec3 res3 = vec3(res.x,res.y,res.z);
return vec3Normalized(&res3);
}
Vec2 cameraWorldToScreenPoint(Camera *cam, Vec3 worldPos)
{
Vec4 worldCoord = vec4FromVec3AndW(worldPos, 1.0);
Mat4 viewProjection;
mat4Mul(&viewProjection, &cam->perspectiveMatrix, &cam->transformMatrix);
Vec4 ret4;
mat4Vec4Mul(&ret4, &viewProjection, &worldCoord);
vec4Scale(&ret4, &ret4, 1.0/ret4.w);
Vec2 ret;
ret.x = ret4.x;
ret.y = ret4.y;
return ret;
}
Vec3 cameraScreenDepthToWorldPoint(Camera *cam, Vec2 screenPos, r32 depth)
{
Vec4 screenCoord = vec4(screenPos.x, screenPos.y, depth, 1.0);
Mat4 mat = cameraCalculateInverseViewMatrix(cam);
Mat4 mat2 = invPerspective(&cam->perspectiveMatrix);
Mat4 camInvPerspective;
mat4Mul(&camInvPerspective, &mat, &mat2);
Vec4 ret4;
mat4Vec4Mul(&ret4, &camInvPerspective, &screenCoord);
vec4Scale(&ret4, &ret4, 1.0/ret4.w);
return vec3FromVec4(ret4);
}
void transformToView(struct transform *tr, vec3 vin, vec3 vout)
{
vec4 in, out;
in[0] = vin[0];
in[1] = vin[1];
in[2] = vin[2];
in[3] = 0.0;
mat4Vec4Mul(tr->view, in, out);
vec4Normalize(out, out);
vout[0] = out[0];
vout[1] = out[1];
vout[2] = out[2];
// vec3Normalize(vout);
}
void draw(struct hypnomix *hyp)
{
float angle = hyp->var.smooth[0] * 2.0 * M_PI; // * hyp->pr.var[0];
float translate = hyp->var.smooth[1] * hyp->pr.var[1];
float scale = hyp->var.smooth[2] * hyp->pr.var[2];
float facevtx[] = {
-1.0, -1.0, 0.0,
1.0, -1.0, 0.0,
-1.0, 1.0, 0.0,
1.0, 1.0, 0.0,
};
float facenrm[] = {
0.0, 0.0, 1.0,
0.0, 0.0, 1.0,
0.0, 0.0, 1.0,
0.0, 0.0, 1.0
};
float faceclr[] = {
0.0, 0.0, 1.0, 1.0,
0.0, 0.0, 1.0, 1.0,
0.0, 0.0, 1.0, 1.0,
0.0, 0.0, 1.0, 1.0
};
unsigned int faceidx[] = {
0, 1, 2,
2, 1, 3
};
skyboxDraw(hyp, 0.0, angle, 0.0);
transformIdentity(&hyp->tr);
// transformModelScale(&hyp->tr, scale, scale, scale);
transformModelRotate(&hyp->tr, 0.0, angle, 0.0);
// transformViewRotate(&hyp->tr, 0.0, angle, 0.0);
transformViewTranslate(&hyp->tr, 0.0, 0.0, -4.0);
transformMVP(&hyp->tr);
glUseProgram(hyp->pg.id);
glEnableVertexAttribArray(hyp->pg.pos);
glEnableVertexAttribArray(hyp->pg.clr);
glEnableVertexAttribArray(hyp->pg.nrm);
glUniformMatrix4fv(hyp->pg.mvp, 1, GL_FALSE, hyp->tr.mvp);
glUniformMatrix3fv(hyp->pg.mnormal, 1, GL_FALSE, hyp->tr.mnormal);
// transformMVCoordinates(&hyp->tr, &(hyp->lights.dir[0]), lightdir[0]);
//lightdir[0][0] = 0.0;
//lightdir[0][1] = 0.0;
//lightdir[0][2] = 1.0;
// glUniform3fv(hyp->pg.lightdir, hyp->lights.nb, lightdir[0]);
// transformMVCoordinates(&hyp->tr, &(hyp->lights.pos[0]), lightpos[0]);
// glUniform3fv(hyp->pg.lightpos, hyp->lights.nb, lightpos[0]);
vec4 lightdir;
vec4 tmp;
tmp[0] = hyp->lights.dir[0][0];
tmp[1] = hyp->lights.dir[0][1];
tmp[2] = hyp->lights.dir[0][2];
tmp[3] = 0.0;
mat4Vec4Mul(hyp->tr.view, tmp, lightdir);
vec4Normalize(lightdir, lightdir);
/*fprintf(stderr, "LIGHTDIR=%f,%f,%f,%f\n", lightdir[0], lightdir[1], lightdir[2], lightdir[3]); */
glUniform3fv(hyp->pg.lightdir, hyp->lights.nb, lightdir);
//glUniform3fv(hyp->pg.lightpos, hyp->lights.nb, hyp->lights.pos);
/*
glVertexAttribPointer(hyp->pg.pos, 3, GL_FLOAT, GL_FALSE, 0, vtx);
glVertexAttribPointer(hyp->pg.nrm, 3, GL_FLOAT, GL_FALSE, 0, nrm);
glVertexAttribPointer(hyp->pg.clr, 4, GL_FLOAT, GL_FALSE, 0, clr);
*/
//glEnable(GL_CULL_FACE);
//glCullFace(GL_BACK);
glVertexAttribPointer(hyp->pg.pos, 3, GL_FLOAT, GL_FALSE, 0, facevtx);
glVertexAttribPointer(hyp->pg.nrm, 3, GL_FLOAT, GL_FALSE, 0, facenrm);
glVertexAttribPointer(hyp->pg.clr, 4, GL_FLOAT, GL_FALSE, 0, faceclr);
glDrawElements(GL_TRIANGLES, 6, GL_UNSIGNED_INT, faceidx);
// glDrawElements(GL_TRIANGLES, 12, GL_UNSIGNED_INT, idx);
//glDisable(GL_CULL_FACE);
/* show normals */
float nrmlines[4*6];
float x, y, z;
int i;
for(i = 0; i < 4; i++) {
x = facevtx[i*3];
y = facevtx[i*3+1];
z = facevtx[i*3+2];
nrmlines[i*6] = x;
nrmlines[i*6+1] = y;
nrmlines[i*6+2] = z;
nrmlines[i*6+3] = x + facenrm[i*3] * 0.4;
nrmlines[i*6+4] = y + facenrm[i*3+1] * 0.4;
nrmlines[i*6+5] = z + facenrm[i*3+2] * 0.4;
}
glVertexAttribPointer(hyp->pg.pos, 3, GL_FLOAT, GL_FALSE, 0, nrmlines);
glDrawArrays(GL_LINES, 0, 8);
/* end show normals */
glDisableVertexAttribArray(hyp->pg.nrm);
glDisableVertexAttribArray(hyp->pg.clr);
glDisableVertexAttribArray(hyp->pg.pos);
}