148 lines
4.9 KiB
GLSL
148 lines
4.9 KiB
GLSL
#ifndef MAX_BONES
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#define MAX_BONES 110
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#endif
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uniform mat3x4 vsBoneMatrix[MAX_BONES];
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uniform bool SKINNED; /// set:0
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uniform mat4 M; // RIM
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uniform mat4 VP;
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uniform mat4 P;
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uniform vec3 u_cam_dir;
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uniform int u_billboard;
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#if 0
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// Fetch blend channels from all attached blend deformers.
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for (size_t di = 0; di < mesh->blend_deformers.count; di++) {
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ufbx_blend_deformer *deformer = mesh->blend_deformers.data[di];
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for (size_t ci = 0; ci < deformer->channels.count; ci++) {
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ufbx_blend_channel *chan = deformer->channels.data[ci];
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if (chan->keyframes.count == 0) continue;
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if (num_blend_shapes < MAX_BLEND_SHAPES) {
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blend_channels[num_blend_shapes] = chan;
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vmesh->blend_channel_indices[num_blend_shapes] = (int32_t)chan->typed_id;
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num_blend_shapes++;
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}
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}
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}
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if (num_blend_shapes > 0) {
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vmesh->blend_shape_image = pack_blend_channels_to_image(mesh, blend_channels, num_blend_shapes);
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vmesh->num_blend_shapes = num_blend_shapes;
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}
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ubo.f_num_blend_shapes = (float)mesh->num_blend_shapes;
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for (size_t i = 0; i < mesh->num_blend_shapes; i++) {
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ubo.blend_weights[i] = view->scene.blend_channels[mesh->blend_channel_indices[i]].weight;
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}
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sg_image blend_shapes = mesh->num_blend_shapes > 0 ? mesh->blend_shape_image : view->empty_blend_shape_image;
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#endif
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// for blendshapes
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#ifndef MAX_BLENDSHAPES
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#define MAX_BLENDSHAPES 16
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#endif
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uniform vec4 blend_weights[MAX_BLENDSHAPES]; // @todo: implement me
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uniform float f_num_blend_shapes; // @todo: implement me
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uniform MEDIUMP sampler2DArray blend_shapes; // @todo: implement me
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in vec3 att_position; // @todo: reorder ass2iqe to emit p3 n3 u2 t3 b3 c4B i4 w4 instead
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in vec2 att_texcoord;
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in vec3 att_normal;
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in vec4 att_tangent; // vec3 + bi sign
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in mat4 att_instanced_matrix; // for instanced rendering
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in vec4 att_indexes; // @fixme: gles might use ivec4 instead?
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in vec4 att_weights; // @todo: downgrade from float to byte
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in float att_vertexindex; // for blendshapes
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in vec4 att_color;
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in vec3 att_bitangent; // @todo: remove? also, ass2iqe might output this
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in vec2 att_texcoord2;
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out vec4 v_color;
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out vec3 v_position, v_position_ws;
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out vec3 v_normal, v_normal_ws;
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out vec2 v_texcoord, v_texcoord2;
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out vec3 v_tangent;
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out vec3 v_binormal;
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out vec3 v_viewpos;
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out vec3 v_to_camera;
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out vec3 v_vertcolor;
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// shadow
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uniform mat4 model, view, inv_view;
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uniform mat4 cameraToShadowProjector;
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out vec4 vneye;
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out vec4 vpeye;
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out vec4 sc;
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void do_shadow() {
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vneye = view * model * vec4(att_normal, 0.0f);
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vpeye = view * model * vec4(att_position, 1.0);
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sc = cameraToShadowProjector * model * vec4(att_position, 1.0f);
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}
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// blendshapes
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vec3 evaluate_blend_shape(int vertex_index) {
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ivec2 coord = ivec2(vertex_index & (2048 - 1), vertex_index >> 11);
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int num_blend_shapes = int(f_num_blend_shapes);
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vec3 offset = vec3(0.0);
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for (int i = 0; i < num_blend_shapes; i++) {
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vec4 packedw = blend_weights[i >> 2];
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float weight = packedw[i & 3];
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offset += weight * texelFetch(blend_shapes, ivec3(coord, i), 0).xyz;
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}
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return offset;
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}
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vec3 get_object_pos() {
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vec3 objPos;
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if(!SKINNED) {
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objPos = att_position;
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v_normal = att_normal;
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} else {
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mat3x4 m = vsBoneMatrix[int(att_indexes.x)] * att_weights.x;
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m += vsBoneMatrix[int(att_indexes.y)] * att_weights.y;
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m += vsBoneMatrix[int(att_indexes.z)] * att_weights.z;
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m += vsBoneMatrix[int(att_indexes.w)] * att_weights.w;
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objPos = vec4(att_position, 1.0) * m;
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// blendshapes
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// objPos += evaluate_blend_shape(int(att_vertexindex));
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v_normal = vec4(att_normal, 0.0) * m;
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//@todo: tangents
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}
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return objPos;
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}
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void setup_billboard(mat4 modelView, mat4 l_model) {
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if(u_billboard > 0) {
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vec3 cameraPosition = -transpose(mat3(view)) * view[3].xyz;
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vec3 lookDir = normalize(cameraPosition - v_position_ws);
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vec3 up = vec3(modelView[0][1], modelView[1][1], modelView[2][1]);
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vec3 right = normalize(cross(up, lookDir));
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up = cross(lookDir, right);
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vec3 scale;
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scale.x = length(vec3(l_model[0]));
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scale.y = length(vec3(l_model[1]));
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scale.z = length(vec3(l_model[2]));
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// scale.x *= sign(l_model[0][0]);
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// scale.y *= sign(l_model[1][1]);
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// scale.z *= sign(l_model[2][2]);
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mat4 billboardRotation = mat4(
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vec4(right * scale.x, 0.0),
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vec4(-up * scale.y, 0.0),
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vec4(-lookDir * scale.z, 0.0),
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vec4(0.0, 0.0, 0.0, 1.0)
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);
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if((u_billboard & 0x4) != 0) l_model[0] = billboardRotation[0];
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if((u_billboard & 0x2) != 0) l_model[1] = billboardRotation[1];
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if((u_billboard & 0x1) != 0) l_model[2] = billboardRotation[2];
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modelView = view * l_model;
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}
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} |