void geMatrixMult(float* m){
// geMatrix44Mult(ge_current_matrix, ge_current_matrix, m);
float tmp[16];
geMatrix44Mult(tmp, ge_current_matrix, m);
memcpy(ge_current_matrix, tmp, sizeof(float)*16);
ge_current_matrix_update = true;
}
void ge_Translate(float* m, float x, float y, float z){
float t[16];
ge_LoadIdentity(t);
t[12] = x;
t[13] = y;
t[14] = z;
geMatrix44Mult(m, m, t);
}
void geRotate(float x, float y, float z){
float tx[16], ty[16], tz[16], tb[16];
if(x != 0.0f){
ge_LoadIdentity(tx);
float cx = cosf(x);
float sx = sinf(x);
tx[1*4+1] = cx;
tx[1*4+2] = sx;
tx[2*4+1] = -sx;
tx[2*4+2] = cx;
memcpy(tb, ge_current_matrix, sizeof(float)*16);
geMatrix44Mult(ge_current_matrix, tb, tx);
}
if(y != 0.0f){
ge_LoadIdentity(ty);
float cy = cosf(y);
float sy = sinf(y);
ty[0*4+0] = cy;
ty[0*4+2] = -sy;
ty[2*4+0] = sy;
ty[2*4+2] = cy;
float tb[16];
memcpy(tb, ge_current_matrix, sizeof(float)*16);
geMatrix44Mult(ge_current_matrix, tb, ty);
}
if(z != 0.0f){
ge_LoadIdentity(tz);
float cz = cosf(z);
float sz = sinf(z);
tz[0*4+0] = cz;
tz[0*4+1] = sz;
tz[1*4+0] = -sz;
tz[1*4+1] = cz;
float tb[16];
memcpy(tb, ge_current_matrix, sizeof(float)*16);
geMatrix44Mult(ge_current_matrix, tb, tz);
}
ge_current_matrix_update = true;
}
void ge_Scale(float* m, float x, float y, float z){
float t[16];
ge_LoadIdentity(t);
t[0] = x;
t[5] = y;
t[10] = z;
geMatrix44Mult(m, m, t);
}
void geTranslate(float x, float y, float z){
float t[16];
ge_LoadIdentity(t);
t[12] = x;
t[13] = y;
t[14] = z;
geMatrix44Mult(ge_current_matrix, ge_current_matrix, t);
ge_current_matrix_update = true;
}
void SendModelMatrices(){
geSendMatrix(GE_MATRIX_MODELVIEW, (float*)&ge_matrices[GE_MATRIX_MODELVIEW]);
geSendMatrix(GE_MATRIX_NORMAL, (float*)&ge_matrices[GE_MATRIX_NORMAL]);
float temp[16]; //9
geMatrix44Mult(temp, ge_matrices[GE_MATRIX_PROJECTION], ge_matrices[GE_MATRIX_MODELVIEW]);
glUniformMatrix4fv(loc_mvp, 1, GL_FALSE, temp);
// PrintMatrix("MatrixModelView", (float*)&ge_matrices[GE_MATRIX_MODELVIEW], 4);
// PrintMatrix("MatrixNormal", (float*)&ge_matrices[GE_MATRIX_NORMAL], 4);
}
void geScale(float x, float y, float z){
float t[16];
ge_LoadIdentity(t);
t[0] = x;
t[5] = y;
t[10] = z;
geMatrix44Mult(ge_current_matrix, ge_current_matrix, t);
ge_current_matrix_update = true;
}
void geLookAt(float eyeX, float eyeY, float eyeZ, float centerX, float centerY, float centerZ){
float m[16];
float f[4];
float u[3];
float s[4];
f[0] = centerX - eyeX;
f[1] = centerY - eyeY;
f[2] = centerZ - eyeZ;
f[3] = 0.0;
geNormalize(f);
geCrossProduct(s, f, u_vec);
s[3] = 0.0;
geNormalize(s);
geCrossProduct(u, s, f);
m[0] = s[0];
m[4] = s[1];
m[8] = s[2];
m[12]= 0.0;
m[1] = u[0];
m[5] = u[1];
m[9] = u[2];
m[13]= 0.0;
m[2] = -f[0];
m[6] = -f[1];
m[10]= -f[2];
m[14]= 0.0;
m[3] = 0.0;
m[7] = 0.0;
m[11]= 0.0;
m[15]= 1.0;
float result[16] = { 0.0 };
geMatrix44Mult(result, ge_current_matrix, m);
memcpy(ge_current_matrix, result, sizeof(float)*16);
geTranslate(-eyeX, -eyeY, -eyeZ);
ge_current_matrix_update = true;
}
void CalculateModelMatrices(){
float ModelView3[9];
float temp[16]; //9
geMatrix44Mult(ge_matrices[GE_MATRIX_MODELVIEW], ge_matrices[GE_MATRIX_VIEW], ge_matrices[GE_MATRIX_MODEL]);
ModelView3[0]=ge_matrices[GE_MATRIX_MODELVIEW][0]; ModelView3[1]=ge_matrices[GE_MATRIX_MODELVIEW][1]; ModelView3[2]=ge_matrices[GE_MATRIX_MODELVIEW][2];
ModelView3[3]=ge_matrices[GE_MATRIX_MODELVIEW][4]; ModelView3[4]=ge_matrices[GE_MATRIX_MODELVIEW][5]; ModelView3[5]=ge_matrices[GE_MATRIX_MODELVIEW][6];
ModelView3[6]=ge_matrices[GE_MATRIX_MODELVIEW][8]; ModelView3[7]=ge_matrices[GE_MATRIX_MODELVIEW][9]; ModelView3[8]=ge_matrices[GE_MATRIX_MODELVIEW][10];
geMatrixInverse(temp, ModelView3, 3);
geMatrixTranspose(ge_matrices[GE_MATRIX_NORMAL], temp, 3);
/*
float temp[16]; //9
geMatrixInverse(temp, ge_matrices[GE_MATRIX_MODELVIEW], 4);
geMatrixTranspose(temp2, temp, 4);
ge_matrices[GE_MATRIX_NORMAL][0]=temp2[0]; ge_matrices[GE_MATRIX_NORMAL][1]=temp2[1]; ge_matrices[GE_MATRIX_NORMAL][2]=temp2[2];
ge_matrices[GE_MATRIX_NORMAL][3]=temp2[4]; ge_matrices[GE_MATRIX_NORMAL][4]=temp2[5]; ge_matrices[GE_MATRIX_NORMAL][5]=temp2[6];
ge_matrices[GE_MATRIX_NORMAL][6]=temp2[8]; ge_matrices[GE_MATRIX_NORMAL][7]=temp2[9]; ge_matrices[GE_MATRIX_NORMAL][8]=temp2[10];
*/
}
void geLightComputeShadow(ge_Light* light, ge_Camera* cam, void (*render)(void*), void* udata){
geFramebufferUse(light->shadow_fbo);
geViewport(0, 0, light->shadow_fbo->depth->width, light->shadow_fbo->depth->height);
glDisable(GL_SCISSOR_TEST);
float save_proj[16];
memcpy(save_proj, geGetMatrix(GE_MATRIX_PROJECTION), sizeof(float) * 16);
u32 save_clear_color = libge_context->clear_color;
geClearColor(0xFFFFFFFF);
// glColorMask(GL_FALSE, GL_FALSE, GL_FALSE, GL_FALSE);
//glDisable(GL_CULL_FACE);
//glEnable(GL_CULL_FACE);
//glCullFace(GL_BACK);
glFrontFace(GL_CCW);
geForceShader(light->shadow_shader);
geMatrixMode(GE_MATRIX_VIEW);
geLoadIdentity();
float l_pos[3] = { light->position.x, light->position.y, light->position.z };
geNormalize(l_pos);
l_pos[0] *= 10000.0;
l_pos[1] *= 10000.0;
l_pos[2] *= 10000.0;
float cCam[3] = { cam->cX - cam->x, cam->cY - cam->y, cam->cZ - cam->z };
geNormalize(cCam);
cCam[0] = cCam[0] * 10.0 + cam->x;
cCam[1] = cCam[1] * 10.0 + cam->y;
cCam[2] = cCam[2] * 10.0 + cam->z;
l_pos[0] += cCam[0];
l_pos[1] += cCam[1];
l_pos[2] += cCam[2];
geLookAt(l_pos[0], l_pos[1], l_pos[2], light->target.x + cCam[0], light->target.y + cCam[1], light->target.z + cCam[2]);
static ge_Camera fake_cam;
fake_cam.x = l_pos[0];
fake_cam.y = l_pos[1];
fake_cam.z = l_pos[2];
ge_Camera* cam_save = ge_current_camera;
ge_current_camera = &fake_cam;
/*
float cCam[3] = { cam->cX - cam->x, cam->cY - cam->y, cam->cZ - cam->z };
geNormalize(cCam);
cCam[0] = cCam[0] * 20.0 + cam->x;
cCam[1] = cCam[1] * 20.0 + cam->y;
cCam[2] = cCam[2] * 20.0 + cam->z;
l_pos[0] += cCam[0];
l_pos[1] += cCam[1];
l_pos[2] += cCam[2];
geLookAt(l_pos[0], l_pos[1], l_pos[2], light->target.x + cCam[0], light->target.y + cCam[1], light->target.z + cCam[2]);
*/
// geLookAt(light->position.x, light->position.y, light->position.z, light->position.x + light->target.x * 10.0, light->position.y + light->target.y * 10.0, light->position.z + light->target.z * 10.0);
int i, j;
light->iShadow = max(1, (light->iShadow + 1) % light->shadow_depth);
// for(j=0; j<3; j++){
for(j=0; j<2 && j<light->shadow_depth; j++){
if(j == 0){
i = 0;
}else{
i = max(1, (light->iShadow + j) % light->shadow_depth);
}
glFramebufferTextureLayer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, light->shadow->id, 0, i);
//glFramebufferTextureLayer(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, light->shadow->id, 0, i);
//glFramebufferTexture2D(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_TEXTURE_2D, light->shadow_fbo->depth->id, 0);
geClearScreen();
geMatrixMode(GE_MATRIX_PROJECTION);
geLoadIdentity();
if(light->type == GE_LIGHT_TYPE_SPOT){
gePerspective(90.0, 1.0, 0.001, 500.0);
//light->spot_cutoff
}else{
//float range = 10.0 * expf((float)i * 1.0);
float range = 10.0 * powf(4.0, (float)i * light->shadow_factor);
//float range = 10.0 * powf(2.0, (float)i * 1.0);
// geOrthogonal(-range, range, -range, range, 1.0, 5000.0);
geOrthogonal(-range, range, -range, range, 1.0, 50000.0);
}
float bias[16] = {
0.5, 0.0, 0.0, 0.0,
0.0, 0.5, 0.0, 0.0,
0.0, 0.0, 0.5, 0.0,
0.5, 0.5, 0.5, 1.0
};
float* m_projection = geGetMatrix(GE_MATRIX_PROJECTION);
float* m_view = geGetMatrix(GE_MATRIX_VIEW);
float m_1[16] = { 0.0 };
geMatrix44Mult(m_1, m_projection, m_view);
geMatrixMode(GE_MATRIX_TEXTURE7 - i);
geLoadMatrix(bias);
geMatrixMult(m_1);
//geForceCap(GL_DEPTH_TEST, false);
render(udata);
//geForceCap(GL_DEPTH_TEST, -1);
}
//glEnable(GL_CULL_FACE);
//glCullFace(GL_FRONT);
glFrontFace(GL_CW);
geForceShader(NULL);
geFramebufferUse(NULL);
// geClearMode(last_clear_mode);
glEnable(GL_SCISSOR_TEST);
// glColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE);
geViewport(0, 0, geGetContext()->width, geGetContext()->height);
geClearColor(save_clear_color);
memcpy(libge_context->projection_matrix, save_proj, sizeof(float)*16);
memcpy(geGetMatrix(GE_MATRIX_PROJECTION), save_proj, sizeof(float)*16);
ge_current_camera = cam_save;
}