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fix billboarding code

main
Dominik Madarász 2023-11-06 13:51:17 +01:00
parent 13845097af
commit d5a0dac5d4
5 changed files with 64 additions and 23 deletions
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7
bind/v4k.lua
View File

@ -2905,6 +2905,13 @@ unsigned billboard;
float *instanced_matrices;
unsigned num_instances;
} model_t;
enum BILLBOARD_MODE {
BILLBOARD_X =1,
BILLBOARD_Y =2,
BILLBOARD_Z =4,
BILLBOARD_CYLINDRICAL = BILLBOARD_X|BILLBOARD_Z,
BILLBOARD_SPHERICAL = BILLBOARD_X|BILLBOARD_Y|BILLBOARD_Z
};
model_t model(const char *filename, int flags);
model_t model_from_mem(const void *mem, int sz, int flags);
float model_animate(model_t, float curframe);

53
engine/art/shaders/vs_323444143_16_332_model.glsl
View File

@ -113,34 +113,41 @@ void main() {
// vec3 tangent = att_tangent.xyz;
// vec3 bitangent = cross(att_normal, att_tangent.xyz) * att_tangent.w;
mat4 modelView = view * att_instanced_matrix;
if(u_billboard > 0) {
float sx = length(vec3(modelView[0][0], modelView[1][0], modelView[2][0]));
float sy = length(vec3(modelView[0][1], modelView[1][1], modelView[2][1]));
float sz = length(vec3(modelView[0][2], modelView[1][2], modelView[2][2]));
if((u_billboard & 4) != 0) {
modelView[0][0] = sx;
modelView[0][1] = 0.0;
modelView[0][2] = 0.0;
}
if((u_billboard & 2) != 0) {
modelView[1][0] = 0.0;
modelView[1][1] = sy;
modelView[1][2] = 0.0;
}
if((u_billboard & 1) != 0) {
modelView[2][0] = 0.0;
modelView[2][1] = 0.0;
modelView[2][2] = sz;
}
}
v_normal_ws = normalize(vec3(model * vec4(v_normal, 0.))); // normal to world/model space
v_normal = normalize(v_normal);
v_position_ws = (att_instanced_matrix * vec4( objPos, 1.0 )).xyz;
v_position = att_position;
v_texcoord = att_texcoord;
v_color = att_color;
mat4 modelView = view * att_instanced_matrix;
mat4 l_model = att_instanced_matrix;
v_position_ws = (l_model * vec4( objPos, 1.0 )).xyz;
if(u_billboard > 0) {
vec3 cameraPosition = -transpose(mat3(view)) * view[3].xyz;
vec3 lookDir = normalize(cameraPosition - v_position_ws);
vec3 up = vec3(view[0][1], view[1][1], view[2][1]);
vec3 right = normalize(cross(up, lookDir));
up = cross(lookDir, right);
vec3 scale;
scale.x = length(vec3(att_instanced_matrix[0]));
scale.y = length(vec3(att_instanced_matrix[1]));
scale.z = length(vec3(att_instanced_matrix[2]));
mat4 billboardRotation = mat4(
vec4(right * scale.x, 0.0),
vec4(-up * scale.y, 0.0),
vec4(-lookDir * scale.z, 0.0),
vec4(0.0, 0.0, 0.0, 1.0)
);
if((u_billboard & 0x4) != 0) l_model[0] = billboardRotation[0];
if((u_billboard & 0x2) != 0) l_model[1] = billboardRotation[1];
if((u_billboard & 0x1) != 0) l_model[2] = billboardRotation[2];
modelView = view * l_model;
}
v_position_ws = (l_model * vec4( objPos, 1.0 )).xyz;
gl_Position = P * modelView * vec4( objPos, 1.0 );
do_shadow();
}

9
engine/joint/v4k.h
View File

@ -17640,6 +17640,15 @@ typedef struct model_t {
unsigned num_instances;
} model_t;
enum BILLBOARD_MODE {
BILLBOARD_X = 0x1,
BILLBOARD_Y = 0x2,
BILLBOARD_Z = 0x4,
BILLBOARD_CYLINDRICAL = BILLBOARD_X|BILLBOARD_Z,
BILLBOARD_SPHERICAL = BILLBOARD_X|BILLBOARD_Y|BILLBOARD_Z
};
API model_t model(const char *filename, int flags);
API model_t model_from_mem(const void *mem, int sz, int flags);
API float model_animate(model_t, float curframe);

9
engine/split/v4k_render.h
View File

@ -611,6 +611,15 @@ typedef struct model_t {
unsigned num_instances;
} model_t;
enum BILLBOARD_MODE {
BILLBOARD_X = 0x1,
BILLBOARD_Y = 0x2,
BILLBOARD_Z = 0x4,
BILLBOARD_CYLINDRICAL = BILLBOARD_X|BILLBOARD_Z,
BILLBOARD_SPHERICAL = BILLBOARD_X|BILLBOARD_Y|BILLBOARD_Z
};
API model_t model(const char *filename, int flags);
API model_t model_from_mem(const void *mem, int sz, int flags);
API float model_animate(model_t, float curframe);

9
engine/v4k.h
View File

@ -3707,6 +3707,15 @@ typedef struct model_t {
unsigned num_instances;
} model_t;
enum BILLBOARD_MODE {
BILLBOARD_X = 0x1,
BILLBOARD_Y = 0x2,
BILLBOARD_Z = 0x4,
BILLBOARD_CYLINDRICAL = BILLBOARD_X|BILLBOARD_Z,
BILLBOARD_SPHERICAL = BILLBOARD_X|BILLBOARD_Y|BILLBOARD_Z
};
API model_t model(const char *filename, int flags);
API model_t model_from_mem(const void *mem, int sz, int flags);
API float model_animate(model_t, float curframe);