+misc

1 files changed, 76 insertions, 0 deletions

diff --git a/src/gizmo/visualize.c b/src/gizmo/visualize.c
new file mode 100644
index 0000000..485e6c6
--- /dev/null
+++ b/src/gizmo/visualize.c
@@ -0,0 +1,76 @@
+#include "visualize.h"
+#include "../shaders/common/core.h"
+
+// varying
+#define _color reg_v4_00
+static void vert( Vertex* in, Vec4* clipcoord) {
+	static Vec4 p; p.xyz = in->position; p.w = 1;
+	object2clip(&p, clipcoord);
+	color_tocolor32(in->color, _color);
+}
+static bool frag( Color32* color) {
+	*color = *_color;
+	return 1;
+}
+static Program line_shader = {
+	vert, frag,
+	VARYING_V4_00
+};
+
+void draw_tbn(Mesh* mesh, uint mask, int length) {
+	Color COLOR_RED = 0xffff0000;
+	Color COLOR_GREEN = 0xff00ff00;
+	Color COLOR_BLUE = 0xff0000ff;
+	Vertex* vert_list = NULL;
+	int vert_index = 0;
+	int* lines = NULL;
+	for (int i = 0; i < mesh->vert_count; ++i) {
+		Vertex* vert = &mesh->vertices[i];
+		Vec3 normal = vert->normal;
+		Vec4 tangent = vert->tangent;
+		//Vec4 tangent = vec4(1,0,0,1);
+		if (mask & VISUAL_NORMAL)
+		{
+			Vertex v0 = { vert_index++, vert->position, vec3zero, vec4zero, vec2zero,  COLOR_BLUE };
+			Vertex v1 = { vert_index++, vec3_plus(vert->position, vec3_scale(normal, length)), vec3zero, vec4zero, vec2zero, COLOR_BLUE };
+			darray_push(vert_list, v0);
+			darray_push(vert_list, v1);
+			darray_push(lines, vert_index - 2);
+			darray_push(lines, vert_index - 1);
+		}
+		if (mask & VISUAL_TANGNET)
+		{
+			Vertex v0 = { vert_index++, vert->position, vec3zero, vec4zero, vec2zero,  COLOR_RED };
+			Vertex v1 = { vert_index++, vec3_plus(vert->position, vec3_scale(tangent.xyz, length)), vec3zero, vec4zero, vec2zero, COLOR_RED };
+			darray_push(vert_list, v0);
+			darray_push(vert_list, v1);
+			darray_push(lines, vert_index - 2);
+			darray_push(lines, vert_index - 1);
+		}
+		if (mask & VISUAL_BITANGENT)
+		{
+			Vec3 bitangent = vec3_cross(normal, tangent.xyz);
+			Vertex v0 = { vert_index++, vert->position, vec3zero, vec4zero, vec2zero,  COLOR_GREEN };
+			Vertex v1 = { vert_index++, vec3_plus(vert->position, vec3_scale(bitangent, length)), vec3zero, vec4zero, vec2zero, COLOR_GREEN };
+			darray_push(vert_list, v0);
+			darray_push(vert_list, v1);
+			darray_push(lines, vert_index - 2);
+			darray_push(lines, vert_index - 1);
+		}
+	}
+	ssr_bindvertices(vert_list, darray_size(vert_list));
+	ssr_bindindices(lines, darray_size(lines)* 0.5f);
+	ssr_matrixmode(MATRIX_MODEL);
+	ssr_loadidentity();
+	ssr_useprogram(&line_shader);
+	//ssr_disable(ENABLE_DEPTHTEST);
+	ssr_draw(PRIMITIVE_LINE);
+	ssr_unuseprogram();
+	ssr_enable(ENABLE_WRITEDEPTH);
+	darray_free(vert_list);
+	darray_free(lines);
+}
+
+void draw_wire(Mesh* mesh) {
+
+}
\ No newline at end of file