41 lines
1.9 KiB
GLSL
41 lines
1.9 KiB
GLSL
// Copyright (C) 2022 RozK
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Affero General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Affero General Public License for more details.
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//
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// You should have received a copy of the GNU Affero General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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#version 320 es
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precision highp float;
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#include "include/vertex_format.glsl"
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#include "include/camera.glsl"
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#include "include/common.glsl"
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layout(location = 3) in vec3 i_translation; // per mesh, model space -> world space
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layout(location = 4) in mat3 i_orientation; // per mesh, model space -> world space
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void main(void) {
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vec4 world_position = vec4(i_translation + i_orientation * a_position, 1.0);
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float weight = max(0.0, 1.0 - world_position.z * c_weight_scale);
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vec3 world_normal = i_orientation * a_normal;
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vec2 terrain_coords = c_terrain_shift + world_position.xy * c_terrain_scale;
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world_position.z += texture(u_height_sampler, terrain_coords).r;
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vec4 view_position = u_view * world_position;
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vec3 terrain_normal = normalize(c_normal_shift + texture(u_normal_sampler, terrain_coords).rgb * c_normal_scale);
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world_normal = mat3(cross(c_world_forward, terrain_normal), c_world_forward, terrain_normal) * world_normal;
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v_position = view_position;
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v_normal = u_view * vec4(world_normal, 0.0);
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v_terrain_normal = vec4((u_view * vec4(terrain_normal, 0.0)).xyz, weight);
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v_texcoord = vec4(a_texcoord.st * c_st_scale, a_texcoord.p, a_texcoord.p + 1.0);
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gl_Position = u_projection * view_position;
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}
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