1 files changed, 65 insertions, 0 deletions
diff --git a/src/shaders/pbr.c b/src/shaders/pbr.c
new file mode 100644
index 0000000..c154f02
--- /dev/null
+++ b/src/shaders/pbr.c
@@ -0,0 +1,65 @@
+#include "common.h"
+
+/*uniforms*/
+#define object2world     UM4(0)
+#define light            UV3(0)
+
+#define albedo_tex       UTEX(0)
+#define noraml_tex       UTEX(1)
+#define roughness_tex    UTEX(2)
+#define metalness_tex    UTEX(3)
+
+/*varyings*/
+#define rough            reg_num_00
+#define world_pos        reg_v3_00
+#define depth_pos        reg_v3_01
+#define clip_pos         reg_v4_00
+#define world_normal     reg_v3_02 
+#define world_tangent    reg_v3_03
+#define world_bitangent  reg_v3_04
+
+static void vert(UniformCollection* uniforms, VertexShaderIn* in, Vec4* clipcoord) {
+	static Vec4 p; p.xyz = in->vertex->position; p.w = 1;
+	mat4_mulvec4(uniforms->mvp, &p, clipcoord);
+	Vec4 normal = {
+		in->vertex->normal.x,
+		in->vertex->normal.y,
+		in->vertex->normal.z,
+		1
+	};
+	Vec4 worldnormal; mat4_mulvec4(object2world, &normal, &worldnormal);
+	vec3_normalize(light, light);
+	*rough = 1 - vec3_dot(&worldnormal, light);
+}
+
+static bool frag(UniformCollection* uniforms, FragmentShaderIn* in, Color32* color) {
+	vec3_normalize(light, light);
+	vec3_normalize(&in->normal, &in->normal);
+	float roughness = *rough;
+	//(*color).r = 1;
+	//(*color).g = 1;
+	//(*color).b = 1;
+	//(*color).a = 1;
+	//return 1;
+	//float rough = 1- vec3_dot(&in->normal, light);
+	Color32 c = tex2d(albedo_tex, in->texcoord);
+	//Color32 nc = tex2d(noramltex, in->texcoord);
+	//vec3_scale(&c, roughness, &c);
+	color32_saturate(&c);
+	*color = c;
+	return 1;
+}
+
+Program ssr_built_in_shader_pbr = {
+	vert, frag,
+	VARYING_TEXCOORD |
+	VARYING_NORMAL |
+    
+	VARYING_NUM_00 | 
+	VARYING_V3_00 |
+	VARYING_V3_01 |
+	VARYING_V3_02 |
+	VARYING_V3_03 |
+	VARYING_V3_04 |
+	VARYING_V4_00 
+};
+\ No newline at end of file