Orkuncakilkaya
f25289db20
`Gl.*` binds the whole OpenGL 4.1 core API — every entry point of the platform gl3.h with every GL_* constant, generated by `ludic-dev glgen` with per-call ABI thunks. Windowed builds get an NSOpenGLContext on the existing window at Retina resolution; headless builds render into an offscreen CGL context, so a program that uses Gl.* renders and screenshots identically under the test harness. It links gl.ll, the thunks and OpenGL.framework only when used; every other build stays byte-identical. packages/ludic.render3d is a physically based renderer written on that surface: HDRI image-based lighting, GPU-generated terrain with scanned PBR materials, CDLOD, cascaded shadows, glTF with skinning, instanced vegetation with impostors, procedural grass, water, SSAO, and an HDR pipeline with bloom, auto-exposure and ACES. It also carries this session's work on it: the terrain at half its cost (10.3 -> 5.4 ms of frame), the streaming hitch that got worse the longer you played, a resize that emptied the world, and the packaging that lets a game use the renderer from its own repository — `ludic assets`, the material manifest shipping with the package, and shader lookup falling back to the install root. See changes/ for each, with its numbers. The camping game that drove all of it has moved out to its own repository, Maroon Lake; examples/rendering/smooth.ludic stays as the renderer's example here. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
42 lines
1.4 KiB
GLSL
42 lines
1.4 KiB
GLSL
// camera-facing (around y) card per instance, showing the atlas tile nearest the view angle
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layout(location = 0) in vec2 a_xy; // [-0.5, 0.5] x [0, 1]
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layout(location = 1) in vec2 a_uv;
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layout(location = 3) in vec4 i_pos; // x y z scale
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layout(location = 4) in vec4 i_rot; // sin cos seed wind
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uniform mat4 u_view;
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uniform mat4 u_proj;
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uniform mat4 u_light_vp;
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uniform vec3 u_cam_pos;
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uniform vec3 u_face_dir; // direction the cards face (to the camera, or the sun in the shadow pass)
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uniform float u_radius;
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uniform float u_height;
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uniform float u_tiles;
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out vec2 v_uv;
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out vec3 v_wpos;
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out float v_seed;
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out float v_tile;
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out float v_yaw;
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void main() {
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vec3 center = i_pos.xyz;
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#ifdef SHADOW_PASS
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vec3 toCam = normalize(vec3(u_face_dir.x, 0.0, u_face_dir.z));
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#else
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vec3 toCam = u_cam_pos - center; toCam.y = 0.0; toCam = normalize(toCam);
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#endif
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vec3 right = vec3(-toCam.z, 0.0, toCam.x);
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float yaw = atan(i_rot.x, i_rot.y);
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// angle of the viewer around the (rotated) tree, in tile units
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float ang = atan(toCam.x, -toCam.z) - yaw;
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float t = floor(fract(ang / 6.2831853) * u_tiles + 0.5);
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v_tile = mod(t, u_tiles);
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v_yaw = yaw;
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vec3 w = center + right * (a_xy.x * 2.0 * u_radius * i_pos.w) + vec3(0.0, a_xy.y * u_height * i_pos.w, 0.0);
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v_wpos = w;
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v_uv = a_uv;
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v_seed = i_rot.z;
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#ifdef SHADOW_PASS
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gl_Position = u_light_vp * vec4(w, 1.0);
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#else
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gl_Position = u_proj * u_view * vec4(w, 1.0);
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#endif
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}
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